C program to swap two numbers using temporary variable

PROGRAM:

#include<stdio.h>
int main()
{
    int a,b,temp;
    printf("Enter values of a and b\n");
    scanf("%d%d",&a,&b);
    printf("Before swapping a=%d b=%d\n",a,b);
    temp=a;
    a=b;
    b=temp;
    printf("After swapping a=%d b=%d\n",a,b);
    return 0;
}

OUTPUT:

Enter values of a and b
10
20
Before swapping a=10 b=20
After swapping a=20 b=10