// Write a program to interchange the values of two variables without using a third variable

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