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C++ program to swap two numbers using macros

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#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();
}

Output

Enter two numbers:10
11
x=10 y=11
x=11 y=10
 

Explanation

In this program we have swap the number using macro which is defined by #define

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