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. 
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
}

 
 
Public Test CasesInputExpected OutputActual OutputStatus
Test Case 1
5
8 + j4
8 + j4
Passed
Test Case 2
10
13 + j4
13 + j4
Passed

Private Test cases used for EvaluationStatus
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. 
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
}
 
 
Public Test CasesInputExpected OutputActual OutputStatus
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 EvaluationStatus
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. 
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
}

 
 
Public Test CasesInputExpected OutputActual OutputStatus
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 EvaluationStatus
Test Case 1
Passed
netaji gandi
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