C++ program to demonstrate macro substitution

#include <iostream> //cube using macro substitution
using namespace std;
#define cube(a) (a*a*a)
int main()
{
long x=5;
long y=cube(x);
cout<<"y "<<y<<endl;
int a=5,b=7;
int c=cube((a+b));
cout<<"C "<<c<<endl;
return 0;
}