Swap Two Variable using Call by Reference

Hello Here is a C program to Swap Two integer variable using call by reference.

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#include<stdio.h> void swap (int *o, int *p) { int tmp; tmp = *o; *o = *p; *p = tmp; } main () { int a,b; printf("Enter the value of A:- "); scanf("%d",&a); printf("Enter the value of B:- "); scanf("%d",&b); printf("\nBefore Swap:-\nA = %d\nB = %d",a,b); printf("\nAfter Swap:-"); swap(&a, &b); printf("\nA = %d\nB = %d",a,b); }