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



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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：