NPTEL Programming in Modern C++ | Week 4 : Programming Assignments 1 2 AND 3 | Jan-2022 | NPTEL | Swayam

 

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. 

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

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