测试C++ this指针的用法

test.cpp

#include <iostream>	

using namespace std;

class Box {
private:
	double length;
	double breadth;
	double height;
public:
	Box(double l = 2.0, double b = 2.0, double h = 2.0) {	//构造函数
		cout << "Constructor called." << endl;
		length = l;
		breadth = b;
		height = h;
	}
	double Volume() {		//体积
		return length * breadth * height;
	}
	int compare(Box box) {	//体积对比
		return this->Volume() > box.Volume();   //关键部分
	}
};

int main(void) {
	Box Box1(3.3, 1.2, 1.5);
	Box Box2(8.5, 6.0, 2.0);
	if (Box1.compare(Box2)) {
		cout << "Box2 is smaller than Box1" << endl;
	}
	else {
		cout << "Box2 is equal to or larger than Box1" << endl;
	}
	getchar();
	return 0;
}