4-1 复数类的运算符重载

题目描述

通过本题目的练习可以掌握成员运算符重载及友元运算符重载

要求定义一个复数类，重载加法和减法运算符以适应对复数运算的要求，重载插入运算符(<<)以方便输出一个复数的要求。

输入

要求在主函数中创建对象时初始化对象的值。

输出

输出数据共有4行，分别代表a，b的值和它们求和、求差后的值

示例输入

无

示例输出

a=3.2+4.5ib=8.9+5.6ia+b=12.1+10.1ia-b=-5.7-1.1i

#include<iostream>using namespace std ;class Complex{    public:        Complex(){real=0;imag=0;}        Complex(double r,double i){real=r;imag=i;}        Complex operator + (Complex &c2);        Complex operator - (Complex &c2);        void display();        void display1();    private:        double real;        double imag;};Complex Complex::operator + (Complex &c2){    Complex c;    c.real=real+c2.real;    c.imag=imag+c2.imag;    return c;}Complex Complex::operator - (Complex &c2){    Complex C;    C.real=real-c2.real;    C.imag=imag-c2.imag;    return C;}void Complex:: display(){    cout<<real<<"+"<<imag<<"i"<<endl;}void Complex:: display1(){    cout<<real<<imag<<"i"<<endl;}int main(){    Complex c1(3.2,4.5),c2(8.9,5.6),c3,c4;    c3=c1+c2;    c4=c1-c2;    cout<<"a=";    c1.display();    cout<<"b=";    c2.display();    cout<<"a+b=";    c3.display();    cout<<"a-b=";    c4.display1();    return 0;}