4-1 复数类的运算符重载

Time Limit: 1000MSMemory Limit: 65536KB

SubmitStatistic

Problem Description

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。

Input

 

要求在主函数中创建对象时初始化对象的值。

Output

 

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

Example Input

无

Example Output

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

代码如下：

#include<bits/stdc++.h>using namespace std;class Complex{private:    double real;    double imag;public:    Complex(double r=0.0,double i=0.0):real(r),imag(i) {};    Complex operator+(Complex &c);    Complex operator-(Complex &c);    friend ostream& operator <<(ostream &,Complex&);};Complex Complex :: operator+(Complex &c){    Complex d;    d.real=real+c.real;    d.imag=imag+c.imag;    return d;}Complex Complex :: operator-(Complex &c){    Complex d;    d.real=real-c.real;    d.imag=imag-c.imag;    return d;}ostream &operator <<(ostream &output,Complex&c){    output<<c.real;    if(c.imag>=0)output<<"+";    output<<c.imag<<"i";    return output;}int main(){    Complex a(3.2,4.5),b(8.9,5.6);    cout<<"a="<<a<<endl;    cout<<"b="<<b<<endl;    Complex c;    c=a+b;    cout<<"a+b="<<c<<endl;    c=a-b;    cout<<"a-b="<<c<<endl;    return 0;}