4elist2102.cpp

《21天学通C＋＋》附盘的原代码。书上的每个例子在这里都有相应的C语言程序。

// 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;
}