Aim: To implement a program to swap two numbers using reference arguments.

Code:

void swap(int *a, int *b)

{

            int temp;

            temp=*a;

            *a=*b;

            *b=temp;

}

void main()

{

            int a,b;

            clrscr();

            cout<<"Program to swap two variables.";

            cout<<"\nEnter variables:\nA:";

            cin>>a;

            cout<<"B:";

            cin>>b;

            swap(&a,&b);

            cout<<"\nSwapped variables:\n\nA:"<

            cout<<"\nB:"<

            getch();

}

Output:

Program to swap two variables.

Enter variables:

A:5

B:36

Swapped variables:

A:36

B:5