C program to swap two numbers using macros
#include<iostream.h>#include<conio.h>
#define SWAP(a,b) {int temp; temp=a; a=b; b=temp;}
void main(){ clrscr(); int x,y; cout<<"Enter two numbers:"; cin>>x>>y;
cout<<"x="<<x<<" y="<<y; SWAP(x,y); cout<<"
x="<<x<<" y="<<y; getch();}
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