#include<iostream>
using namespace std;

class Complex
{
public:
	Complex(int a=0, int b=0)
	{
		this->a = a;
		this->b = b;
	}
	//成員函式 實現“-”的過載
	Complex& operator-(Complex &c)
	{
		this->a = this->a - c.a;
		this->b = this->b - c.b;
		cout << this->a<<"+"<<this->b<<"i"<< endl;
		return *this;
	}
public:
	int getA()
	{
		return this->a;
	}
	int getB()
	{
		return this->b;
	}
private:
	int a;
	int b;
};
//全域性函式 實現“+”過載
Complex operator+(Complex &t1, Complex &t2)
{
	Complex tmp(t1.getA()+t2.getA(),t1.getB()+t2.getB());
	cout <<tmp.getA()<<"+"<<tmp.getB()<<"i" << endl;
	return tmp;
}
int main()
{
	/*全域性函式，類成員函式方法實現運算子過載步驟
	1、要承認運算子過載是一個函式，寫出函式名稱   
	2、根據運算元，寫出函式引數
	3、根據業務，完善函式返回值（看函式是返回引用 還是指標 元素），及實現函式業務*/
	Complex c1(1,1);
	Complex c2(1,3);
	//先實現全域性函式
	//Complex c3 = c1 + c2;

	//實現成員函式
	Complex c4(10,10);
	c4.operator-(c1);
	system("pause");


}