Write a program to interchange the values of two variables using a third variable

//Write a C++ program to interchange the values of two variables using third variable.

 #include<iostream.h>

#include<conio.h> void main( ) { int a, b, temp; clrscr( ); cout<<"Enter the two numbers:\n"; cin>>a>>b; cout<<"Before Interchanging : a ="<<a<<" and b = "<<b<<endl; temp = a ; a = b ; b = temp ; cout<<"After Interchanging : a ="<<a<<" and b = "<<b<<endl; getch(); }