list2102.cpp

teach yourself C++ in 21 days 第五版

// Listing 21.2 Macro Expansion
#include <iostream>
using namespace std;

#define CUBE(a) ( (a) * (a) * (a) )
#define THREE(a) a * a * a

int main()
{
   long x = 5;
   long y = CUBE(x);
   long z = THREE(x);

   cout << "y: " << y << endl;
   cout << "z: " << z << endl;

   long a = 5, b = 7;
   y = CUBE(a+b);
   z = THREE(a+b);

   cout << "y: " << y << endl;
   cout << "z: " << z << endl;
   return 0;
}