Programming in Modern C++ | Week 4 : Programming Assignments | Jan-2022 | NPTEL | Swayam

 Programming in Modern C++

If you are using a mobile device then rotate to landscape orientation for better experience.

Week 4 : Programming Assignment 1

Due on 2022-02-24, 23:59 IST

Consider the following program. Fill in the blanks as per the instructions given below:

• at LINE-1 with appropriate declaration so that global operator function can access private data of class Complex,
• at LINE-2 with appropriate operator function header,
• at LINE-3 with appropriate return statement,

such that it will satisfy the given test cases. 

Just scroll your mouse wheel over this code or swipe on this code snippet to scroll down to see the remaining code.

Select the Language for this assignment.      --                     C++               

1

#include<iostream>

2

#include<cstring>

3

using namespace std;

4

5

class Complex{

6

    int re, im;

7

public:

8

    Complex(int r, int i) : re(r), im(i){}

9

    void print(){

10

        cout << re << " + j" << im;

11

    }

12

13

    friend Complex operator+(const Complex &e, int n);      //LINE-1

14

};

15

16

Complex operator+(const Complex &e, int n){            //LINE-2

17

18

    return Complex(e.re+n,e.im);               //LINE-3

19

}

0

int main(){

1

    int n;

2

    cin >> n;

3

    Complex c(3, 4);

4

    Complex c1 = c + n;

5

    c1.print();

6

    return 0;

7

}

Compilation : Passed
Public Test Cases: 2 / 2 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	5	8 + j4	8 + j4	Passed
Test Case 2	10	13 + j4	13 + j4	Passed

Private Test cases used for Evaluation	Status
Test Case 1	Passed

Week 4 : Programming Assignment 2

Due on 2022-02-24, 23:59 IST

Consider the following program. Fill in the blanks as per the instructions given below:

• at LINE-1 with appropriate keyword to declare the Database pointer variable,
• at LINE-2 to complete the header for function getInstance(int i),
• at LINE-3 with appropriate keyword to complete ins variable initialization

such that it will satisfy the given test cases. 

Select the Language for this assignment.      --                     C++               

1

#include<iostream>

2

using namespace std;

3

4

class Database{

5

    int data;

6

    static Database *ins;                    //LINE-1

7

    Database(int i) : data(i) {}

8

public:

9

    int get(){ return data; }

10

    static Database* getInstance(int i){        //LINE-2

11

        if(!ins)

12

            ins = new Database(i);

13

        return ins;

14

    }

15

};

16

17

Database* Database::ins = 0; // LINE-3

0

int main(){

1

    int n, i;

2

    cin >> n;

3

    int a[n];

4

    for(i=1;i<=n;i++)

5

        cin >> a[i];

6

    for(i=1;i<=n;i++){

7

        Database *ins = Database::getInstance(a[i]);

8

        cout << ins->get() << " ";

9

    }

10

    return 0;

11

}

Compilation : Passed
Public Test Cases: 2 / 2 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	2 3 4	3 3	3 3	Passed
Test Case 2	3 2 4 6	2 2 2	2 2 2	Passed

Private Test cases used for Evaluation	Status
Test Case 1	Passed

Week 4 : Programming Assignment 3

Due on 2022-02-24, 23:59 IST

Consider the following program. Fill in the blanks as per the instructions given below:

• at LINE-1 with appropriate statement so that global operator function can access private members,
• at LINE-2 with appropriate operator function header,
• at LINE-3 with appropriate operator function header,
• at LINE-4 with appropriate operator function header

such that it will satisfy the given test cases.

Select the Language for this assignment.      --                     C++               

1

#include<iostream>

2

using namespace std;

3

4

class Point{

5

    int x;

6

    int y;

7

public:

8

    Point(int _x, int _y) : x(_x), y(_y) {}

9

    void print(){

10

        cout << "(" << x << "," << y << ")";

11

    }

12

    friend istream& operator>>(istream& is, Point& p);      //LINE-1

13

14

    Point& operator++(){                                //LINE-2

15

        ++x;

16

        return *this;

17

    }

18

    Point operator++(int){                              //LINE-3

19

        Point p(x,y);

20

        ++y;

21

        return p;

22

    }

23

};  // End of class Point

24

25

26

istream& operator>>(istream& is, Point& p){                //LINE-4

27

    is >> p.x >> p.y;

28

    return is;

29

}

0

int main(){

1

    int i, j;

2

    cin >> i >> j;

3

    Point p(i,j);

4

    ++(++p);

5

    p++;

6

    p.print();

7

    return 0;

8

}

Compilation : Passed
Public Test Cases: 2 / 2 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	3 4	(5,5)	(5,5)	Passed
Test Case 2	5 2	(7,3)	(7,3)	Passed

Private Test cases used for Evaluation	Status
Test Case 1	Passed

Please subscribe to our YouTube Channel :  Swayam Solver

This will help the creator to go on and on...

Have a great day !