proj9_02.cpp

来自「C++程序设计教程的全部源代码 包含与教程同步的PPT 方便学习」· C++ 代码 · 共 38 行

#include <iostream.h> 
class sample
{
private:
	int counter;
public:
	sample()
	{
		counter = 0;
	}
	sample operator ++()     //定义前缀运算符 ++a
	{
		++ counter;
		return *this;      //返回原对象
	}
	sample operator ++(int)  //定义后缀运算符 a++
	{
		sample temp(*this);         //临时对象存放原有对象值
		counter ++;                 //原有对象增量修改
		return temp;                //返回原有对象值
	}
	void display()
	{
		cout << counter << endl;
	}
};
void main()
{
	sample obj1,obj2,obj3;
	obj1.display();
	obj2 = 	++obj1;    //前缀运算符
	obj2.display();
	obj3 = obj1++;     //后缀运算符
	obj3.display();

	obj1.display();
}