Slip 3 - A) Write a C++ program to interchange values of two integer numbers. (Usecall by reference).

 Solution;

#include<iostream>

using namespace std;

void swap(int &a, int&b) {

    int temp;

    temp = a;

    a = b;

    b = temp;

}

int main() {

    int a,b;

    cout << "Enter two numbers" << endl;

    cout << "Enter first number: ";

    cin >> a;

    cout << "Enter second number: ";

    cin >> b;

    cout << endl << "Original Numbers" << endl << "a = " << a << " & b = " << b << endl;

    swap(a, b);

    cout << endl << "After swap Numbers" << endl << "a = " << a << " & b = " << b << endl;

    return 0;

}