C++ Program to swap two Number

Program -

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

int a,b;

void swap(int,int);

a=5;

b=23;

cout<<"\n value of a="<<a<<"and value of b="<<b<<"before swap";

swap(a,b);

cout<<"\n value of a="<<a<<"and value of b="<<b<<"after the swap";

getch();

}

void swap(int x,int y)

{

int temp;

temp=x;

x=y;

y=temp;

return;

}

 Output - 

 value of a=5and value of b=23before swap

 value of a=5and value of b=23after the swap