Write a C program that swaps the values of two integer varia

Write a C++ program that swaps the values of two integer variables a and b. Use a function swap1(*p1, *p2). Print a and b before and after swapping. Hint: Use a temp variable.

Solution

Two ways to do this Program. I have added both ways.

First way

#include <stdio.h>
#include<iostream.h>
void swap1(int *p1,int *p2)
{
int tmp;
tmp = *p1;
*p1 = *p2;
*p2 = tmp;
}

int main()
{
    int a=5;
    int b=10;
    cout<< \"Before the swap, A is \" << a << \" and B is \" << b << \".\"<< endl;
    swap1(&a,&b);
    cout<< \"After the swap, A is \" << a << \" and B is \" << b << \".\"<< endl;
    return 0;
}

Second Way

#include <stdio.h>
#include<conio.h>
#include<iostream.h>
void swap1(int &p1,int &p2)
{
int tmp;
tmp = p1;
p1 = p2;
p2 = tmp;
}

int main()
{
    int a=5;
    int b=10;
    int *p1,*p2;
    p1=&a;
    p2=&b;
    cout<< \"Before the swap, A is \" << a << \" and B is \" << b << \".\"<< endl;
    swap1(*p1,*p2);
    cout<< \"After the swap, A is \" << a << \" and B is \" << b << \".\"<< endl;
    return 0;
}