Program to swap two numbers using functions.

 Program to swap two numbers using functions.
#include<stdio.h>
#include<conio.h>
void main()
{
void swap(int,int);
int a,b,r;
clrscr();
printf(“enter value for a&b: ”);
scanf(“%d%d”,&a,&b);
swap(a,b);
getch();
}
void swap(int a,int b)
{
int temp;
temp=a;
a=b;
b=temp;
printf(“after swapping the value for a & b is : %d %d”,a,b);
}
Output:
enter value for a&b: 4
5
after swapping the value for a & b : 5 4