第八周 【项目1-实现复数类中的运算符重载】

问题描述：

（1）请用类的成员函数，定义复数类重载运算符+、-、*、/，使之能用于复数的加减乘除

 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);
     Complex operator*(const Complex &c2);
     Complex operator/(const Complex &c2);
     void display();
 private:
     double real;
     double imag;
 };
 //下面定义成员函数


 //下面定义用于测试的main()函数
 int main()
 {
     Complex c1(3,4),c2(5,-10),c3;
     cout<<"c1=";
     c1.display();
     cout<<"c2=";
     c2.display();
     c3=c1+c2;
     cout<<"c1+c2=";
     c3.display();
     c3=c1-c2;
     cout<<"c1-c2=";
     c3.display();
     c3=c1*c2;
     cout<<"c1*c2=";
     c3.display();
     c3=c1/c2;
     cout<<"c1/c2=";
     c3.display();
     return 0;
 }

代码：

main.cpp

#include <iostream>
#include "Complex.h"
using namespace std;
int main(){
    Complex c1(3,4),c2(5,-10),c3;
    cout<<"c1=";
    c1.display();
    cout<<"c2=";
    c2.display();
    c3=c1+c2;
    cout<<"c1+c2=";
    c3.display();
    c3=c1-c2;
    cout<<"c1-c2=";
    c3.display();
    c3=c1*c2;
    cout<<"c1*c2=";
    c3.display();
    c3=c1/c2;
    cout<<"c1/c2=";
    c3.display();
    return 0;
}

Complex.h

#ifndef COMPLEX_H
#define COMPLEX_H
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);
    Complex operator*(const Complex &c2);
    Complex operator/(const Complex &c2);
    void display();
private:
    double real;
    double imag;
};
#endif // COMPLEX_H

Complex.cpp

#include <iostream>
#include "Complex.h"
using namespace std;
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;
}
Complex Complex :: operator*(const Complex &c2){
    Complex c;
    c.real=real*c2.real-imag*c2.imag;
    c.imag=imag*c2.real+real*c2.imag;
    return c;
}
Complex Complex :: operator/(const Complex &c2){
    Complex c;
    c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
    c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
    return c;
}
void Complex::display(){
    cout<<real<<"+"<<imag<<"i\n";
}

运行结果：