++的前置和后置

#include <iostream>
using namespace std;
class Test
{
private:
	int num;
public:
	Test():num(0)
	{}
	Test& operator=(const int &num)
	{
		this->num = num;
		return *this;
	}
	Test& operator=(const Test &test)
	{
		this->num = test.num;
		return *this;
	}
	Test operator++(int)//后置
	{
		Test temp = *this;
		++(this->num);
		return temp;
	}

	Test& operator++()//前置，返回的是引用
	{
		++(this->num);
		return *this;
	}

	operator int()//向int转换
	{
		return num;
	}

};

int main()
{
	Test t1,t2;

	int nt1 = ++t1;
	cout<<"应该是1，实际是"<<nt1<<endl;//输出1
	int nt2 = t2++;
	cout<<"应该是0，实际是"<<nt2<<endl;//输出0
	return 0;
}