#define SUM(X) (X * X)

#define MAX(c,y) (c > y ) ? (c) : (y)

#include <stdio.h>
void main()
{
int a=10,b=20,c,d;
c = SUM(a+b);
printf(“\n Result is %d”, c);
d = MAX(a,b); 
if( d == a)
printf(“\n A is greater than B”);
else
printf(“\n B is greater than A”);