运算符重载（作为成员函数）

运算符重载---基本概念

C++程序设计

郭炜 刘家瑛

#include<iostream>
using namespace std;
class Complex{
private:
        double real;
        double    imaginary;
public:
        Complex(double a=0.0,double b=0.0) : real(a),imaginary(b) {}//初始化 
        ~Complex(){}
        Complex operator+(Complex& a);
        Complex operator-(Complex& b);
        void print();
};
Complex Complex::operator+(Complex& a){
    return Complex(real+a.real,imaginary+a.imaginary);
}//运算符重载函数(作为成员函数) 
Complex Complex::operator-(Complex& a){
    return Complex(real-a.real,imaginary-a.imaginary);
}//运算符重载函数(作为成员函数)
void Complex::print(){
    cout<<real<<"+"<<imaginary<<"i"<<endl; 
}
int main()
{
    Complex x,y(3,7),z(2,3);
    x=y+z;//相当于y.operator+(z),z为参数 
    x.print();
    x=y-z;//相当于y.operator-(z),z为参数
    x.print();
    return 0;
}