#include <stdio.h>
void swap(int num1, int num2)
{
    int temp;

     printf("In Function values before swapping: %d %d\n", num1, num2);

     temp = num1;
    num1 = num2;
    num2 = temp;

     printf("In Function values after swapping: %d %d\n\n", num1, num2);
}

 int main()
{
    int n1, n2;

     printf("Enter two numbers: ");
    scanf("%d%d", &n1, &n2);

     printf("In Main values before swapping: %d %d\n\n", n1, n2);

     swap(n1, n2);
    printf("In Main values after swapping: %d %d", n1, n2);

     return 0;
}
OUTPUT : 

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