符号重载函数


/* 
*Copyright(c) 2016.烟台大学计算机与控制工程学院 
*ALL rights  reserved. 
*文件名称：test.cpp 
*作者：隋宗涛 
*完成日期：2016年5月14日 
*问题描述:在(2)的基础上，扩展+、-、*、/运算符的功能，使之能与double型数据进行运算。 
          设Complex c; double d; c+d和d+c的结果为“将d视为实部为d的复数同c相加”，其他-、*、/运算符类似 
*/  
#include<iostream>  
using namespace std;  
class Complex  
{  
public:  
    Complex(){real=0;imag=0;}  
    Complex(double r,double i){real=r; imag=i;}  
    friend Complex operator+(Complex &c1,Complex &c2);  
    friend Complex operator+(double d1, Complex &c2);  
    friend Complex operator+(Complex &c1, double d2);  
    friend Complex operator-(Complex &c1,Complex &c2);  
    friend Complex operator-(double d1, Complex &c2);  
    friend Complex operator-(Complex &c1, double d2);  
    friend Complex operator*(Complex &c1,Complex &c2);  
    friend Complex operator*(double d1, Complex &c2);  
    friend Complex operator*(Complex &c1, double d2);  
    friend Complex operator/(Complex &c1,Complex &c2);  
    friend Complex operator/(double d1, Complex &c2);  
    friend Complex operator/(Complex &c1, double d2);  
    void display();  
private:  
    double real;  
    double imag;  
};  
//下面定义成员函数  
//复数相加： (a+bi)+(c+di)=(a+c)+(b+d)i  
Complex operator+(Complex &c1,Complex &c2)  
{  
    Complex c;  
    c.real=c1.real+c2.real;  
    c.imag=c1.imag+c2.imag;  
    return c;  
}  
Complex operator+(double d1, Complex &c2)  
{  
    Complex c(d1,0);  
    return c+c2;  
}  
Complex operator+(Complex &c1, double d2)  
{  
   Complex c(d2,0);  
    return c1+c;  
}  
//复数相减： (a+bi)-(c+di)=(a-c)+(b-d)i  
Complex operator-(Complex &c1,Complex &c2)  
{  
    Complex c;  
    c.real=c1.real-c2.real;  
    c.im
4000
ag=c1.imag-c2.imag;  
    return c;  
}  
Complex operator-(double d1, Complex &c2)  
{  
    Complex c(d1,0);  
    return c-c2;  
}  
Complex operator-(Complex &c1, double d2)  
{  
   Complex c(d2,0);  
    return c1-c;  
}  
//复数相乘：(a+bi)(c+di)=(ac－bd)+(bc+ad)i  
Complex operator*(Complex &c1,Complex &c2)  
{  
    Complex c;  
    c.real=c1.real*c2.real-c1.imag*c2.imag;  
    c.imag=c1.imag*c2.real+c1.real*c2.imag;  
    return c;  
}  
Complex operator*(double d1, Complex &c2)  
{  
    Complex c(d1,0);  
    return c*c2;  
}  
Complex operator*(Complex &c1, double d2)  
{  
   Complex c(d2,0);  
    return c1*c;  
}  
  
//复数相除：(a+bi)/(c+di)=(ac+bd)/(c*c+d*d) +(bc-ad)/(c*c+d*d)i  
Complex operator/(Complex &c1,Complex &c2)  
{  
    Complex c;  
    c.real=(c1.real*c2.real+c1.imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);  
    c.imag=(c1.imag*c2.real-c1.real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);  
    return c;  
}  
Complex operator/(double d1, Complex &c2)  
{  
    Complex c(d1,0);  
    return c/c2;  
}  
Complex operator/(Complex &c1, double d2)  
{  
   Complex c(d2,0);  
    return c1/c;  
}  
 void Complex::display()  
{  
    cout<<"("<<real<<","<<imag<<"i)"<<endl;  
}  
//下面定义用于测试的main()函数  
int main()  
{  
    Complex c1(3,4),c2(5,-10),c3;  
    double d;  
    cout<<"c1=";  
    c1.display();  
    cout<<"c2=";  
    c2.display();  
    cout<<"请输入实数:";  
    cin>>d;  
    cout<<"d="<<d<<endl<<endl;  
    c3=c1+c2;  
    cout<<"c1+c2=";  
    c3.display();  
    cout<<"c1+d=";  
    (c1+d).display();  
    cout<<"d+c1=";  
    (d+c1).display();  
    c3=c1-c2;  
    cout<<"c1-c2=";  
    c3.display();  
    cout<<"c1-d=";  
    (c1-d).display();  
    cout<<"d-c1=";  
    (d-c1).display();  
    c3=c1*c2;  
    cout<<"c1*c2=";  
    c3.display();  
    cout<<"c1*d=";  
    (c1*d).display();  
    cout<<"d*c1=";  
    (d*c1).display();  
    c3=c1/c2;  
    cout<<"c1/c2=";  
    c3.display();  
    cout<<"c1/d=";  
    (c1/d).display();  
    cout<<"d/c1=";  
    (d/c1).display();  
    return 0;  
}  

/*
*Copyright(c) 2016.烟台大学计算机与控制工程学院
*ALL rights  reserved.
*文件名称：test.cpp
*作者：杨驰
*完成日期：2016年5月14日
*问题描述:在(2)的基础上，扩展+、-、*、/运算符的功能，使之能与double型数据进行运算。
设Complex c; double d; c+d和d+c的结果为“将d视为实部为d的复数同c相加”，其他-、*、/运算符类似
*/
#include<iostream>
using namespace std;
class Complex
{
public:
Complex(){real=0;imag=0;}
Complex(double r,double i){real=r; imag=i;}
friend Complex operator+(Complex &c1,Complex &c2);
friend Complex operator+(double d1, Complex &c2);
friend Complex operator+(Complex &c1, double d2);
friend Complex operator-(Complex &c1,Complex &c2);
friend Complex operator-(double d1, Complex &c2);
friend Complex operator-(Complex &c1, double d2);
friend Complex operator*(Complex &c1,Complex &c2);
friend Complex operator*(double d1, Complex &c2);
friend Complex operator*(Complex &c1, double d2);
friend Complex operator/(Complex &c1,Complex &c2);
friend Complex operator/(double d1, Complex &c2);
friend Complex operator/(Complex &c1, double d2);
void display();
private:
double real;
double imag;
};
//下面定义成员函数
//复数相加： (a+bi)+(c+di)=(a+c)+(b+d)i
Complex operator+(Complex &c1,Complex &c2)
{
Complex c;
c.real=c1.real+c2.real;
c.imag=c1.imag+c2.imag;
return c;
}
Complex operator+(double d1, Complex &c2)
{
Complex c(d1,0);
return c+c2;
}
Complex operator+(Complex &c1, double d2)
{
Complex c(d2,0);
return c1+c;
}
//复数相减： (a+bi)-(c+di)=(a-c)+(b-d)i
Complex operator-(Complex &c1,Complex &c2)
{
Complex c;
c.real=c1.real-c2.real;
c.imag=c1.imag-c2.imag;
return c;
}
Complex operator-(double d1, Complex &c2)
{
Complex c(d1,0);
return c-c2;
}
Complex operator-(Complex &c1, double d2)
{
Complex c(d2,0);
return c1-c;
}
//复数相乘：(a+bi)(c+di)=(ac－bd)+(bc+ad)i
Complex operator*(Complex &c1,Complex &c2)
{
Complex c;
c.real=c1.real*c2.real-c1.imag*c2.imag;
c.imag=c1.imag*c2.real+c1.real*c2.imag;
return c;
}
Complex operator*(double d1, Complex &c2)
{
Complex c(d1,0);
return c*c2;
}
Complex operator*(Complex &c1, double d2)
{
Complex c(d2,0);
return c1*c;
}

//复数相除：(a+bi)/(c+di)=(ac+bd)/(c*c+d*d) +(bc-ad)/(c*c+d*d)i
Complex operator/(Complex &c1,Complex &c2)
{
Complex c;
c.real=(c1.real*c2.real+c1.imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
c.imag=(c1.imag*c2.real-c1.real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
return c;
}
Complex operator/(double d1, Complex &c2)
{
Complex c(d1,0);
return c/c2;
}
Complex operator/(Complex &c1, double d2)
{
Complex c(d2,0);
return c1/c;
}
void Complex::display()
{
cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
//下面定义用于测试的main()函数
int main()
{
Complex c1(3,4),c2(5,-10),c3;
double d;
cout<<"c1=";
c1.display();
cout<<"c2=";
c2.display();
cout<<"请输入实数:";
cin>>d;
cout<<"d="<<d<<endl<<endl;
c3=c1+c2;
cout<<"c1+c2=";
c3.display();
cout<<"c1+d=";
(c1+d).display();
cout<<"d+c1=";
(d+c1).display();
c3=c1-c2;
cout<<"c1-c2=";
c3.display();
cout<<"c1-d=";
(c1-d).display();
cout<<"d-c1=";
(d-c1).display();
c3=c1*c2;
cout<<"c1*c2=";
c3.display();
cout<<"c1*d=";
(c1*d).display();
cout<<"d*c1=";
(d*c1).display();
c3=c1/c2;
cout<<"c1/c2=";
c3.display();
cout<<"c1/d=";
(c1/d).display();
cout<<"d/c1=";
(d/c1).display();
return 0;
}

运行结果：



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