usingparen.cpp

来自「《24学时精通c++》的光盘内容」· C++ 代码 · 共 24 行

 // Listing 21.2 Macro Expansion
 #include <iostream>
 
 #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);
 
     std::cout << "y: " << y << std::endl;
     std::cout << "z: " << z << std::endl;
 
     long a = 5, b = 7;
     y = CUBE(a+b);
     z = THREE(a+b);
 
     std::cout << "y: " << y << std::endl;
     std::cout << "z: " << z << std::endl;
     return 0;
 }