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NPTEL Problem Solving Through Programming In C - Programming Assignment | July-2025

NPTEL Problem Solving Through Programming In C - Programming Assignment | July-2025

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NPTEL » Problem Solving through Programming in C


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Week-06 Program-01

Due on 2025-09-04, 23:59 IST
Write a C Program to find Largest Element of an Integer Array. Here the number of elements in the array ‘n’ and the elements of the array is read from the test data.

Use the printf statement given below to print the largest element. printf("Largest element = %d", largest);
Select the Language for this assignment. 
1
~~~THERE IS SOME INVISIBLE CODE HERE~~~
2
#include <stdio.h>
3
int main()
4
{
5
    int i, n, largest;
6
    int arr[100];
7
    scanf("%d", &n); /*Accepts total number of elements from the test data */
8
for(i = 0; i < n; ++i)
9
    {
10
       scanf("%d", &arr[i]); /* Accepts the array element from test data */
11
    }
12
largest = arr[0];
13
for(i = 1; i < n; ++i)
14
    {
15
           if(largest < arr[i])
16
           largest = arr[i];
17
    }
18
    printf("Largest element = %d", largest);
19
    return 0;
20
}
You may submit any number of times before the due date. The final submission will be considered for grading.
Assignment will be evaluated only after submitting using Submit button below. If you only save as , your assignment will not be graded and you will not see your score after the deadline.



Week-06 Program-02

Due on 2025-09-04, 23:59 IST
Write a C Program to print the array elements in reverse order (Not reverse sorted order. Just the last element will become first element, second last element will become second element and so on).

Here the size of the array, ‘n’ and the array elements is accepted from the test case data. The last part i.e. printing the array is also written. You have to complete the program so that it prints in the reverse order.
Your last recorded submission was on 2025-08-29, 16:58 IST
Select the Language for this assignment. 
1
#include<stdio.h>
2
3
int main() {
4
   int arr[20], i, n;
5
6
   scanf("%d", &n); /* Accepts the number of elements in the array */
7
​
8
  for (i = 0; i < n; i++)
9
     scanf("%d", &arr[i]); /*Accepts the elements of the array */
10
int j, temp;
11
j = i - 1;   // last Element of the array
12
i = 0;       // first element of the array
13
   while (i < j) {
14
      temp = arr[i];
15
      arr[i] = arr[j];
16
      arr[j] = temp;
17
      i++;
18
      j--;
19
   }
0
for (i = 0; i < n; i++) {
1
      printf("%d\n", arr[i]); // For printing the array elements
2
   }
3
4
   return (0);
5
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
5
1
2
3
4
5
5\n
4\n
3\n
2\n
1
5\n
4\n
3\n
2\n
1\n

Passed after ignoring Presentation Error
Test Case 2
4
45
65
35
25
25\n
35\n
65\n
45
25\n
35\n
65\n
45\n

Passed after ignoring Presentation Error



Week-06 Program-03

Due on 2025-09-04, 23:59 IST
Write a C program to read Two One Dimensional Arrays of same data type (integer type) and merge them into another One Dimensional Array of same type.
Your last recorded submission was on 2025-08-29, 16:59 IST
Select the Language for this assignment. 
1
#include<stdio.h>
2
int main()
3
{
4
   int arr1[20], arr2[20], array_new[40], n1, n2, size, i;
5
 /*n1 size of first array (i.e. arr1[]), n2 size of second array(i.e. arr2[]),
6
   size is the total size of the new array (array_new[]) */
7
8
   scanf("%d", &n1); //Get the size of first array from test data and store it in n1.
9
10
   for (i = 0; i < n1; i++)
11
      scanf("%d", &arr1[i]); //Accepts the values for first array
12
13
   scanf("%d", &n2); //Get the size of second array from test data and store it in n2.
14
15
   for (i = 0; i < n2; i++)
16
      scanf("%d", &arr2[i]); //Accepts the values for second array
17
scanf("%d", &n2); //Get the size of second array from test data and store it in n2.
18
   for (i = 0; i < n2; i++)
19
      scanf("%d", &arr2[i]); //Accepts the values for second array
20
//Merge two arrays
21
int j;
22
for (i=0;i<n1;++i)
23
array_new[i]=arr1[i];
24
size =  n1 + n2;
25
for(i=0, j=n1; j<size && i<n2; ++i, ++j)
26
array_new[j] = arr2[i];
0
//Printing after merging
1
​
2
for (i = 0; i < size; i++) {
3
      printf("%d\n", array_new[i]);
4
   }
5
​
6
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
3
10
20
30
4
40
50
60
70
10\n
20\n
30\n
40\n
50\n
60\n
70
10\n
20\n
30\n
40\n
50\n
60\n
70\n

Passed after ignoring Presentation Error
Test Case 2
4
9
7
6
5
2
30
50
9\n
7\n
6\n
5\n
30\n
50
9\n
7\n
6\n
5\n
30\n
50\n

Passed after ignoring Presentation Error



Week-06 Program-04

Due on 2025-09-04, 23:59 IST
Write a C Program to delete duplicate elements from an array of integers.
Your last recorded submission was on 2025-08-29, 17:04 IST
Select the Language for this assignment. 
1
#include<stdio.h>
2
3
int main()
4
{
5
   int array[50], i, size;
6
7
   scanf("%d", &size); /*Accepts the size of array from test case data */
8
​
9
   for (i = 0; i < size; i++)
10
   scanf("%d", &array[i]); /* Read the array elements from the test case data */
11
int j, k;
12
   for (i = 0; i < size; i++) {
13
      for (j = i + 1; j < size;) {
14
         if (array[j] == array[i]) {
15
            for (k = j; k < size; k++) {
16
               array[k] = array[k + 1];
17
            }
18
            size--;
19
         } else
20
            j++;
21
      }
22
   }
0
for (i = 0; i < size; i++) {
1
      printf("%d\n", array[i]);
2
   }
3
​
4
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
5
50
60
30
20
30
50\n
60\n
30\n
20
50\n
60\n
30\n
20\n

Passed after ignoring Presentation Error
Test Case 2
6
40
20
50
30
20
10
40\n
20\n
50\n
30\n
10
40\n
20\n
50\n
30\n
10\n

Passed after ignoring Presentation Error





Week-07 Program-01

Due on 2025-09-11, 23:59 IST
Write a C Program to Count Number of Uppercase and Lowercase Letters in a given string. The given string may be a word or a sentence.
Your last recorded submission was on 2025-09-10, 19:28 IST
Select the Language for this assignment. 
1
#include<stdio.h>
2
int main() {
3
   int upper = 0, lower = 0;
4
   char ch[100];
5
   scanf(" %[^\n]s", ch);  /*A word or a sentence is accepted from test case data */
6
​
7
/* Complete the remaining part of the code to store number of uppercase letters
8
in the variable upper and lowercase letters in variable lower.
9
The print part of already written. You can declare any variable if necessary */
10
int i = 0;
11
   while (ch[i] != '\0') {
12
      if (ch[i] >= 'A' && ch[i] <= 'Z')
13
         upper++;
14
      if (ch[i] >= 'a' && ch[i] <= 'z')
15
         lower++;
16
      i++;
17
   }
0
printf("Uppercase Letters : %d\n", upper); /*prints number of uppercase letters */
1
   printf("Lowercase Letters : %d", lower); /*prints number of lowercase letters */
2
3
   return (0);
4
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
Online NPTEL Course.
Uppercase Letters : 7\n
Lowercase Letters : 10
Uppercase Letters : 7\n
Lowercase Letters : 10
Passed
Test Case 2
National Programme on Technology Enhanced Learning is a joint initiative of the IITs and IISc.
Uppercase Letters : 11\n
Lowercase Letters : 68
Uppercase Letters : 11\n
Lowercase Letters : 68
Passed



Week-07 Program-02

Due on 2025-09-11, 23:59 IST

Write a C program to find the sum of all elements of each row of a matrix.

   Example: For a matrix  4 5 6

                                        6 7 3

                                        1 2 3

  The output will be 

  15

  16

   6

Your last recorded submission was on 2025-09-10, 19:29 IST
Select the Language for this assignment. 
1
#include <stdio.h>
2
int main()
3
{
4
    int matrix[20][20];
5
    int i,j,r,c;
6
​
7
    scanf("%d",&r); //Accepts number of rows
8
    scanf("%d",&c); //Accepts number of columns
9
​
10
    for(i=0;i< r;i++) //Accepts the matrix elements from the test case data
11
    {
12
        for(j=0;j< c;j++)
13
        {
14
            scanf("%d",&matrix[i][j]);
15
        }
16
    }
17
/*Complete the code to print the sum of each rows. Use the printf() statement as
18
 printf("%d\n",sum); Where sum is the sum of a row.
19
*/
20
int sum;
21
    for(i=0;i< r;i++)
22
    {
23
        sum=0;
24
        for(j=0;j< c;j++)
25
        {
26
          //  printf("%d\t",matrix[i][j]);
27
            sum     +=  matrix[i][j];
28
        }
29
        printf("%d\n",sum);
30
    }
31
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
3
3
1
1
1
2
2
2
3
3
3
3\n
6\n
9
3\n
6\n
9\n

Passed after ignoring Presentation Error
Test Case 2
2
3
1
2
3
4
5
6
6\n
15
6\n
15\n

Passed after ignoring Presentation Error



Week-07 Program-03

Due on 2025-09-11, 23:59 IST

Write a C program to find subtraction of two matrices i.e. matrix_A - matrix_B=matrix_C.

 If the given martix are 

 2 3 5     and  1 5 2    Then the output will be  1 -2 3

 4 5 6             2 3 4                                           2 2 2

 6 5 7             3 3 4                                           3 2 3

 The elements of the output matrix are separated by one blank space 

Your last recorded submission was on 2025-09-10, 19:30 IST
Select the Language for this assignment. 
1
#include <stdio.h>
2
int main()
3
{
4
    int matrix_A[20][20], matrix_B[20][20], matrix_C[20][20];
5
    int i,j,row,col;
6
    scanf("%d",&row); //Accepts number of rows
7
    scanf("%d",&col); //Accepts number of columns
8
9
    /* Elements of first matrix are accepted from test data */
10
    for(i=0; i<row; i++)
11
    {
12
        for(j=0; j<col; j++)
13
        {
14
            scanf("%d", &matrix_A[i][j]);
15
        }
16
    }
17
​
18
     /* Elements of second matrix are accepted from test data */
19
20
    for(i=0; i<row; i++)
21
    {
22
        for(j=0; j<col; j++)
23
        {
24
            scanf("%d", &matrix_B[i][j]);
25
        }
26
    }
27
​
28
/* Complete the program to get the desired output. Use printf() statement as below
29
    printf("%d ", matrix_C[i][j]); You can declare your own variables if required.
30
*/
31
for(i=0; i<row; i++)
32
    {
33
        for(j=0; j<col; j++)
34
        {
35
            matrix_C[i][j] = matrix_A[i][j] - matrix_B[i][j];
36
        }
37
    }
38
     for(i=0; i<row; i++)
39
    {
40
        for(j=0; j<col; j++)
41
        {
42
            printf("%d ", matrix_C[i][j]);
43
        }
44
        printf("\n");
45
    }
46
    return 0;
47
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
3
3
2
3
5
4
5
6
6
5
7
1
5
2
2
3
4
3
3
4
1 -2 3 \n
2 2 2 \n
3 2 3
1 -2 3 \n
2 2 2 \n
3 2 3 \n

Passed after ignoring Presentation Error



Week-07 Program-04

Due on 2025-09-11, 23:59 IST

Write a C program to print lower triangle of a square matrix.

For example the output of a given matrix 

2 3 4     will be            2 0 0
5 6 7                           5 6 0
4 5 6                           4 5 6

Your last recorded submission was on 2025-09-10, 19:30 IST
Select the Language for this assignment. 
1
#include <stdio.h>
2
int main()
3
{
4
int matrix[20][20];
5
int i,j,r;
6
7
scanf("%d", &r); //Accepts number of rows or columns
8
​
9
    for(i=0;i< r;i++) //Accepts the matrix elements from the test case data
10
    {
11
        for(j=0;j<r; j++)
12
        {
13
            scanf("%d",&matrix[i][j]);
14
        }
15
    }
16
​
17
/* Complete the program to get the desired output. Use the printf() statement as
18
printf("%d ", matrix[i][j]);
19
*/
20
for(i=0; i<r; i++) {
21
        for(j=0; j<r; j++) {
22
            if(i>=j)
23
                printf("%d ", matrix[i][j]);
24
            else
25
                printf("%d ", 0);
26
        }
27
        printf("\n");
28
    }
29
return 0;
30
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
3
1
2
3
1
2
3
1
2
3
1 0 0 \n
1 2 0 \n
1 2 3
1 0 0 \n
1 2 0 \n
1 2 3 \n

Passed after ignoring Presentation Error





Week-08: Program-01

Due on 2025-09-18, 23:59 IST
Write a C Program to find HCF of 4 given numbers using recursive function
Your last recorded submission was on 2025-09-15, 10:06 IST
Select the Language for this assignment. 
1
#include<stdio.h>
2
int HCF(int, int); //You have to write this function which calculates the HCF.
3
4
int main()
5
{
6
   int a, b, c, d, result;
7
   scanf("%d %d %d %d", &a, &b, &c, &d); /* Takes 4 number as input from the test data */
8
   result = HCF(HCF(a, b), HCF(c,d));
9
   printf("The HCF is %d", result);
10
}
11
​
12
//Complete the rest of the program to calculate HCF
13
int HCF(int x, int y)
14
{
15
   while (x != y)
16
   {
17
      if (x > y)
18
       {
19
           return HCF(x - y, y);
20
       }
21
       else
22
       {
23
       return HCF(x, y - x);
24
       }
25
    }
26
    return x;
27
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
100
30
50
70
The HCF is 10
The HCF is 10
Passed
Test Case 2
49
56
147
21
The HCF is 7
The HCF is 7
Passed



Week-08: Program-02

Due on 2025-09-18, 23:59 IST
Write a C Program to find power of a given number using recursion. The number and the power to be calculated is taken from test case
Your last recorded submission was on 2025-09-15, 10:07 IST
Select the Language for this assignment. 
1
#include <stdio.h>
2
long power(int, int);
3
int main()
4
{
5
int pow, num;
6
long result;
7
​
8
scanf("%d", &num); //The number taken as input from test case data
9
​
10
scanf("%d", &pow); //The power is taken from the test case
11
result = power(num, pow);
12
printf("%d^%d is %ld", num, pow, result);
13
return 0;
14
}
15
long power(int num, int pow)
16
{
17
if (pow)
18
{
19
return (num * power(num, pow - 1));
20
}
21
return 1;
22
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
5
2
5^2 is 25
5^2 is 25
Passed
Test Case 2
10
4
10^4 is 10000
10^4 is 10000
Passed



Week-08 Program-03

Due on 2025-09-18, 23:59 IST
Write a C Program to print Binary Equivalent of an Integer using Recursion
Your last recorded submission was on 2025-09-15, 10:07 IST
Select the Language for this assignment. 
1
#include <stdio.h>
2
int binary_conversion(int); //function to convert binary to decimal number
3
int main()
4
  {
5
  int num, bin;  //num is the decimal number and bin is the binary equivalent for the number
6
​
7
  scanf("%d", &num); //The decimal number is taken from the test case data
8
  bin = binary_conversion(num); //binary number is stored in variable bin
9
  printf("The binary equivalent of %d is %d\n", num, bin);
10
  return 0;
11
  }
12
int binary_conversion(int num)
13
  {
14
     if (num == 0)
15
        {
16
            return 0;
17
        }
18
        else
19
        {
20
            return (num % 2) + 10 * binary_conversion(num / 2);
21
        }
22
  }
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
10
The binary equivalent of 10 is 1010
The binary equivalent of 10 is 1010\n

Passed after ignoring Presentation Error
Test Case 2
257
The binary equivalent of 257 is 100000001
The binary equivalent of 257 is 100000001\n

Passed after ignoring Presentation Error



Week-08 Program-04

Due on 2025-09-18, 23:59 IST

Write a C program to print a triangle of prime numbers upto given number of lines of the triangle.
e.g If number of lines is 3 the triangle will be 
2
3      5      
7      11      13      

Your last recorded submission was on 2025-09-15, 10:10 IST
Select the Language for this assignment. 
1
#include<stdio.h>
2
3
int prime(int num); //Function to find whether the number is prime or not.
4
int main() {
5
   int lines;
6
   scanf("%d", &lines); //Number of lines of the triangle is taken from test data.
7
​
8
//use the printf statement as printf("%d\t", variable_name); to print the elements in a row
9
int i, j;
10
int num = 2;
11
for (i = 0; i < lines; i++) {
12
13
   for (j = 0; j <= i; j++) {
14
      while (!prime(num))
15
      {
16
         num++;
17
      }
18
         printf("%d\t", num++);
19
      }
20
      printf("\n");
21
   }
22
   return (0);
23
}
24
25
int prime(int num) {
26
   int i, flag;
27
   for (i = 2; i < num; i++) {
28
      if (num % i != 0)
29
         flag = 1;
30
      else {
31
         flag = 0;
32
         break;
33
      }
34
   }
35
36
   if (flag == 1 || num == 2)
37
      return (1);
38
   else
39
      return (0);
40
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
3
2	\n
3	5	\n
7	11	13
2	\n
3	5	\n
7	11	13	\n

Passed after ignoring Presentation Error
Test Case 2
5
2	\n
3	5	\n
7	11	13	\n
17	19	23	29	\n
31	37	41	43	47
2	\n
3	5	\n
7	11	13	\n
17	19	23	29	\n
31	37	41	43	47	\n

Passed after ignoring Presentation Error





Week-09 Program-01

Due on 2025-09-25, 23:59 IST

Write a program to print all the locations at which a particular element (taken as input) is found in a list and also print the total number of times it occurs in the list. The location starts from 1.

For example if there are 4 elements in the array

5

6

5

7

If the element to search is 5 then the output will be

5 is present at location 1

5 is present at location 3

5 is present 2 times in the array.

Your last recorded submission was on 2025-09-20, 10:08 IST
Select the Language for this assignment. 
1
#include <stdio.h>
2
int main()
3
{
4
   int array[100], search, n, count = 0;
5
   //"search" is the key element to search and 'n' is the total number of element of the array
6
   // "count" is to store total number of elements
7
​
8
 scanf("%d", &n); //Number of elements is taken from test case
9
​
10
 int c;
11
   for (c = 0; c < n; c++)
12
      scanf("%d", &array[c]);
13
​
14
   scanf("%d", &search); // The element to search is taken from test case
15
​
16
/* Use the printf statements as below:
17
"%d is present at location %d.\n"  for each locations
18
"%d is not present in the array.\n" if the element is not found in the list
19
"%d is present %d times in the array.\n"
20
*/
21
for (c = 0; c < n; c++)
22
    {
23
      if (array[c] == search)
24
      {
25
         printf("%d is present at location %d.\n", search, c+1);
26
         count++;
27
      }
28
    }
29
   if (count == 0)
30
      printf("%d is not present in the array.\n", search);
31
   else
32
      printf("%d is present %d times in the array.\n", search, count);
33
​
34
   return 0;
35
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
4
5
6
5
7
5
5 is present at location 1.\n
5 is present at location 3.\n
5 is present 2 times in the array.
5 is present at location 1.\n
5 is present at location 3.\n
5 is present 2 times in the array.\n

Passed after ignoring Presentation Error
Test Case 2
5
67
80
45
97
100
50
50 is not present in the array.
50 is not present in the array.\n

Passed after ignoring Presentation Error



Week-09 Program-02

Due on 2025-09-25, 23:59 IST

Write a C program to search a given element from a 1D array and display the position at which it is found by using linear search function. The index location starts from 1.

Your last recorded submission was on 2025-09-20, 10:09 IST
Select the Language for this assignment. 
1
#include <stdio.h>
2
int linear_search(int[], int, int);
3
int main()
4
{
5
   int array[100], search, c, n, position;
6
   /* search - element to search, c - counter, n - number of elements in array,
7
   position - The position in which the element is first found in the list. */
8
​
9
    scanf("%d", &n); // Number of elements in the array is read from the test case data
10
​
11
    for (c = 0; c < n; c++)
12
    scanf("%d", &array[c]); //Elements of array is read from the test data
13
​
14
    scanf("%d", &search);  //Element to search is read from the test case data
15
​
16
   /* Use the following in the printf statement to print the output
17
   printf("%d is not present in the array.\n", search);
18
   printf("%d is present at location %d.\n", search, position+1); //As array[0] has the position 1
19
   */
20
position = linear_search(array, n, search);
21
   if (position == -1)
22
      printf("%d is not present in the array.\n", search);
23
   else
24
      printf("%d is present at location %d.\n", search, position+1);
25
   return 0;
26
}
27
​
28
int linear_search(int a[], int n, int find) {
29
   int c;
30
   for (c = 0 ;c < n ; c++ )
31
    {
32
      if (a[c] == find)
33
         return c;
34
    }
35
   return -1;
36
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
5
78
90
34
54
98
90
90 is present at location 2.
90 is present at location 2.\n

Passed after ignoring Presentation Error
Test Case 2
6
30
40
50
20
90
60
90
90 is present at location 5.
90 is present at location 5.\n

Passed after ignoring Presentation Error



Week-09 Program-03

Due on 2025-09-25, 23:59 IST

Write a C program to search a given number from a sorted 1D array and display the position at which it is found using binary search algorithm. The index location starts from 1.


Your last recorded submission was on 2025-09-20, 10:23 IST
Select the Language for this assignment. 
1
#include <stdio.h>
2
int main()
3
{
4
 int c, n, search,
5
 array[100];
6
 scanf("%d",&n); //number of elements in the array
7
​
8
 for (c = 0; c < n; c++)
9
 scanf("%d",&array[c]);
10
​
11
 scanf("%d", &search); //The element to search is read from test case.
12
​
13
/* Use the printf statements as below:
14
 printf("%d found at location %d.\n", search, variable_name);
15
 printf("Not found! %d isn't present in the list.\n", search);
16
*/
17
int first, last, middle;
18
   first = 0;
19
   last = n - 1;
20
   middle = (first+last)/2;
21
​
22
   while (first <= last) {
23
      if (array[middle] < search)
24
         first = middle + 1;
25
      else if (array[middle] == search) {
26
         printf("%d found at location %d.\n", search, middle+1);
27
         break;
28
      }
29
      else
30
         last = middle - 1;
31
​
32
      middle = (first + last)/2;
33
      }
34
   if (first > last)
35
      printf("Not found! %d isn't present in the list.\n", search);
36
​
37
     return 0;
38
      }
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
5
10
20
30
40
50
40
40 found at location 4.
40 found at location 4.\n

Passed after ignoring Presentation Error
Test Case 2
4
44
55
66
77
10
Not found! 10 isn't present in the list.
Not found! 10 isn't present in the list.\n

Passed after ignoring Presentation Error



Week-09 Program-04

Due on 2025-09-25, 23:59 IST

Write a C program to reverse an array by swapping the elements and without using any new array.

Your last recorded submission was on 2025-09-20, 10:13 IST
Select the Language for this assignment. 
1
#include <stdio.h>
2
int main() {
3
  int array[100], n, c;
4
  scanf("%d", &n); // n is number of elements in the array.
5
  for (c = 0; c < n; c++) {
6
    scanf("%d", &array[c]);
7
  }
8
int temp, end;
9
   end = n - 1;
10
   for (c = 0; c < n/2; c++) {
11
    temp       = array[c];
12
    array[c]   = array[end];
13
    array[end] = temp;
14
​
15
    end--;
16
  }
0
printf("Reversed array elements are:\n");
1
​
2
  for (c = 0; c < n; c++) {
3
    printf("%d\n", array[c]);
4
  }
5
  return 0;
6
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
4
10
20
30
40
Reversed array elements are:\n
40\n
30\n
20\n
10
Reversed array elements are:\n
40\n
30\n
20\n
10\n

Passed after ignoring Presentation Error
Test Case 2
5
50
60
40
30
20
Reversed array elements are:\n
20\n
30\n
40\n
60\n
50
Reversed array elements are:\n
20\n
30\n
40\n
60\n
50\n

Passed after ignoring Presentation Error





Week-10 Program-01

Due on 2025-10-02, 23:59 IST
Your last recorded submission was on 2025-09-24, 09:14 IST
Select the Language for this assignment. 
1
#include<stdio.h>
2
float fun (float x); //Function fun returns the function value of f(x)
3
void bisection (float *x, float a, float b, int *itr); // This function computes the root of f(x) using bisection method
4
​
5
int main ()
6
{
7
    int itr = 0, maxmitr=10;
8
    float x, a=1.0, b=2.0, allerr, x1; // x is the value of root in each iteration, x1 is the final value of the root
9
   // a and b are the initial range for calculating the root using bisection method
10
11
scanf("%f", &allerr);  // allerr is the allowable error taken from test case data
12
    bisection (&x, a, b, &itr);
13
​
14
/* Use the printf statement as given below to print the root
15
printf("Root = %1.4f\n", x1); */
16
do
17
    {
18
        if (fun(a)*fun(x) < 0)
19
            b=x;
20
        else
21
            a=x;
22
        bisection (&x1, a, b, &itr);
23
        if (((x1-x)<0 && -(x1-x)< allerr) || ((x1-x)>0 && (x1-x)< allerr))
24
        {
25
            printf("Root = %1.4f\n", x1);
26
            return 0;
27
        }
28
        x=x1;
29
    }
30
    while (itr < maxmitr);
31
    return 1;
32
}
33
float fun (float x)
34
{
35
    return (2*x*x*x - 3*x - 5);
36
}
37
void bisection (float *x, float a, float b, int *itr)
38
{
39
    *x=(a+b)/2;
40
    ++(*itr);
41
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
0.001
Root = 1.7197
Root = 1.7197\n

Passed after ignoring Presentation Error



Week-10 Program-02

Due on 2025-10-02, 23:59 IST
Write a C code to check if a 3 x 3 matrix is invertible. A matrix is not invertible if its determinant is 0.
Your last recorded submission was on 2025-09-24, 09:21 IST
Select the Language for this assignment. 
1
#include<stdio.h>
2
 int main()
3
{
4
  int a[3][3], i, j;
5
  long determinant;
6
 //  9 elements of matrix is taken as input from test data
7
  for(i = 0 ; i < 3; i++)
8
      for(j = 0; j < 3; j++)
9
           scanf("%d", &a[i][j]);
10
​
11
/*Use the printf statements as:
12
printf("The given matrix is not invertible");
13
printf("The given matrix is invertible");
14
*/
15
determinant = a[0][0] * ((a[1][1]*a[2][2]) - (a[2][1]*a[1][2])) -a[0][1] * (a[1][0]
16
   * a[2][2] - a[2][0] * a[1][2]) + a[0][2] * (a[1][0] * a[2][1] - a[2][0] * a[1][1]);
17
   if ( determinant == 0)
18
       printf("The given matrix is not invertible");
19
   else
20
       printf("The given matrix is invertible");
21
   return 0;
22
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
1
2
3
4
5
6
7
8
9
The given matrix is not invertible
The given matrix is not invertible
Passed
Test Case 2
1
0
5
2
1
6
3
4
0
The given matrix is invertible
The given matrix is invertible
Passed



Week-10 Program-03

Due on 2025-10-02, 23:59 IST
Write a C program to sort a given 1D array using pointer in ascending order.
Your last recorded submission was on 2025-09-24, 09:16 IST
Select the Language for this assignment. 
1
#include <stdio.h>
2
int main()
3
{
4
    int a[100],i, n;
5
    scanf("%d",&n);  //Number of elements of the array is taken from the test case data
6
7
   for (i=0; i<n; i++)
8
    {
9
        scanf("%d",a+i); // Input the array elements
10
    }
11
int j,t;
12
for (i=0; i<(n-1); i++)
13
    {
14
        for (j=i+1; j<n; j++)
15
        {
16
            if (*(a+i)>*(a+j))
17
            {
18
                t=*(a+i);
19
                *(a+i)=*(a+j);
20
                *(a+j)=t;
21
            }
22
        }
23
    }
0
//   Printing sorted array in ascending order
1
    for (i=0; i<n; i++)
2
    {
3
        printf("%d\n",*(a+i));
4
    }
5
    return 0;
6
   }
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
5
20
40
50
30
10
10\n
20\n
30\n
40\n
50
10\n
20\n
30\n
40\n
50\n

Passed after ignoring Presentation Error



Week-10 Program-04

Due on 2025-10-02, 23:59 IST
Write a C program to sort a 1D array using pointer by applying Bubble sort technique.
Your last recorded submission was on 2025-09-24, 09:16 IST
Select the Language for this assignment. 
1
#include<stdio.h>
2
void sort(int *a, int n);
3
int main()
4
{
5
    int a[20];
6
    int n,i;
7
    scanf("%d",&n); // Enter number of elements to sort is taken from test case data
8
9
    for(i=0;i<n;i++)
10
    {
11
        scanf("%d",&a[i]); // The elements of the array is taken from the test data
12
    }
13
​
14
sort(a, n); // Calling the sorting function
15
​
16
    //Printing the sorted array
17
    for(i=0;i<n;i++)
18
    {
19
        printf("%d\n",a[i]);
20
    }
21
   return 0;
22
}
23
void sort(int *a, int n)
24
{
25
    int i,temp,j;
26
    for(i=1;i<n;i++)
27
    {
28
        for(j=0;j<n-i;j++)
29
        {
30
           if(*(a+j)>=*(a+j+1))
31
        {
32
            temp = *(a+j);
33
            *(a+j)= *(a+j+1);
34
            *(a+j+1)= temp;
35
        }
36
        }
37
    }
38
}
You may submit any number of times before the due date. The final submission will be considered for grading.
This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.
   


 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
6
-10
90
30
20
-100
50
-100\n
-10\n
20\n
30\n
50\n
90
-100\n
-10\n
20\n
30\n
50\n
90\n

Passed after ignoring Presentation Error







































































































































































































































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