运算符重载

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/**烟台大学计算机学院*文件名称：main.cpp*作    者：王者健*完成日期：2016年6月14日*版 本 号：codeblocks 16.01*问题描述：*输入描述：*程序输出：*/#include<iostream>using namespace std;class Complex{public:      Complex(){real=0;imag=0;}      Complex(double r,double i){real=r;imag=i;}      Complex operator+(const Complex &c2);      Complex operator-(const Complex &c2);      void display();private:      double real;      double imag;};Complex Complex::operator+(const Complex &c2){      Complex c;      c.real=real+c2.real;      c.imag=imag+c2.imag;      return c;}Complex Complex::operator-(const Complex &c2){      Complex c;      c.real=real-c2.real;      c.imag=imag-c2.imag;      return c;}void Complex::display(){      cout<<real<<","<<imag<<"i"<<endl;}int main(){    Complex c1(1,2),c2(3,-4),c3;    cout<<"c1=";    c1.display();    cout<<"c2=";    c2.display();    c3=c1+c2;    c3.display();    c3=c1-c2;    c3.display();    return 0;}

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