c++复合运算

成员函数，友元，运算符重载。

 代码基于Visual Studio 2013 update 4

Etc.

// diyTypeCal.cpp : 定义控制台应用程序的入口点。

//

#include "stdafx.h"

#include<iostream>

//复数运算

class Complex

{

protected:

double real;

double imag;

public:

Complex(double r =0.00,double i =0.00){

real = r;

imag = i;

}

void outPut();

//Complex add(Complex c);

//Complex add(double r);

////通过友元进行非成员函数运算

//friend Complex add(Complex c1, Complex c2);

//friend Complex add(Complex c, double r);

//friend Complex add(double r, Complex c);

////运算符重载

//Complex operator +(Complex c);

//Complex operator +(double r);

//补个乘法

Complex operator*(Complex c);

Complex operator*(double r);

//通过友元进行非成员函数运算符重载

friend Complex operator+(Complex c1, Complex c2);

friend Complex operator+(Complex c,double r);

friend Complex operator+(double r, Complex c);

};

Complex Complex::operator*(Complex c){

return Complex(real * c.real - imag* c.imag, real*c.imag + imag * c.real);

}

Complex Complex::operator*(double r){

return Complex(real *r, imag * r);

}

////运算符重载函数

//Complex Complex::operator+(Complex c){

//    return Complex(real+c.real,imag+c.imag);

//}

//Complex Complex::operator+(double r){

//    return Complex(real+r,imag);

//}

//通过友元进行非成员函数运算符重载

Complex operator+(Complex c1,Complex c2){

return Complex(c1.real + c2.real, c1.imag + c2.imag);

}

Complex operator+(Complex c,double r){

return Complex(c.real + r, c.imag);

}

Complex operator+(double r, Complex c){

return Complex(c.real + r, c.imag);

}

////友元运算函数

//Complex add(Complex c1, Complex c2){

//    return Complex(c1.real + c2.real, c1.imag + c2.imag);

//}

//Complex add(Complex c, double r){

//    return Complex(c.real + r, c.imag);

//}

//Complex add(double r, Complex c){

//    return Complex(r + c.real, c.imag);

//}

//通用输出函数

void Complex::outPut(){

if(imag<0.00)

{

std::cout <<"("<< real << imag <<"i)"<< std::endl;

}

else

{

std::cout <<"("<< real <<"+"<< imag <<"i)"<< std::endl;

}

}

////成员运算函数

//Complex Complex::add(Complex c){

//    return Complex(real + c.real, imag + c.imag);

//}

//Complex Complex::add(double x){

//    return Complex(real+x,imag);

//}

int _tmain(int argc, _TCHAR* argv[])

{

Complex a(1.5,23.43), b(12.12,-45.23);

Complex c1, c2, c3, c4,c5;

//以上add全部为多态

//c1 = a.add(b);

//c2 = b.add(-24.5);

//c3 = add(c1, c2);

//c4 = add(c3, 5.258);

//c5 = c3 + c4;

//c1.outPut();

//c2.outPut();

//c3.outPut();

//c4.outPut();

//c5.outPut();

c1 = a + b;

c1.outPut();

return0;

}