c++復合運算
成員函數，友元，運算符重載。
代碼基於Visual Studio 2013 update 4
Etc.
// diyTypeCal.cpp : 定義控制台應用程序的入口點。
//
#include "stdafx.h"
#include<iostream>
//復數運算
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);
////通過友元進行非成員函數運算
//friend Complex add(Complex c1, Complex c2);
//friend Complex add(Complex c, double r);
//friend Complex add(double r, Complex c);
////運算符重載
//Complex operator +(Complex c);
//Complex operator +(double r);
//補個乘法
Complex operator*(Complex c);
Complex operator*(double r);
//通過友元進行非成員函數運算符重載
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);
}
////運算符重載函數
//Complex Complex::operator+(Complex c){
// return Complex(real+c.real,imag+c.imag);
//}
//Complex Complex::operator+(double r){
// return Complex(real+r,imag);
//}
//通過友元進行非成員函數運算符重載
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);
}
////友元運算函數
//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);
//}
//通用輸出函數
void Complex::outPut(){
if(imag<0.00)
{
std::cout <<"("<< real << imag <<"i)"<< std::endl;
}
else
{
std::cout <<"("<< real <<"+"<< imag <<"i)"<< std::endl;
}
}
////成員運算函數
//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全部為多態
//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;
