洗刷刷——实现复数运算中＋运算符的重载

#include <iostream>
#include <cstdlib>
#include <fstream>
#include <cstring>
using namespace std;
class Complex
{
public:
    Complex(double r=0,double i=0):real(r),imag(i) {}
    Complex operator+(const Complex &c2);
    friend istream& operator>>(istream&,const Complex &c2);
    friend ostream& operator<<(ostream&,const Complex &c2);
//声明需要的成员或友元函数，包括构造函数、用于重载运算符的函数及用于显示结果的函数
private:
    double real;
    double imag;
};
//下面定义成员函数
Complex Complex::operator+(const Complex &c2)
{
    Complex c;
    c.real=real+c2.real;
    c.imag=imag+c2.imag;
    return c;
}
istream& operator>>(istream& in,const Complex &c2)
{
    in>>c2.real>>c2.imag;
    return in;
}
ostream& operator<<(ostream& out,const Complex &c2)
{
    cout<<"("<<c2.real<<','<<c2.imag<<"i)";
}
//下面用main()函数测试，完成输入输出
int main()
{
    double cr1, ci1, cr2, ci2;
    cin>>cr1>>ci1>>cr2>>ci2;
    Complex c1(cr1, ci1),c2(cr2, ci2),c3;
    c3=c1+c2;
    cout<<c3;
    return 0;
}

运行结果;

学习总结：

运算符重载这个必须得好好看看了！