C program to swap values of two variables using function (call by value).

#include<stdio.h>

#include<conio.h>

void main(){

int a,b;

void swap(int,int);

clrscr();

printf("Enter two integer numbers\n");

scanf("%d%d",&a,&b);

printf("Before swapping A=%d and B=%d\n",a,b);

swap(a,b);

//actual arguments will not change.

printf("A=%d and B=%d\n",a,b);

getch();

}

void swap(int x,int y){

int z;

z=x;

x=y;

y=z;

printf("After swapping A=%d and B=%d\n",x,y);

return;

}