(C/C++学习笔记操作符重载入门)

#include "iostream"
using namespace std;

//a+bi

class  Complex
{
public:
int a;
int b;
public:
Complex(int a = 0, int b = 0)
{
this->a = a;
this->b = b;
}
void printCom()
{
cout<<a<<"+"<<b<<"i"<<endl;
}
};
void main01()
{
Complex c1(1, 2), c2(3, 4);

int a = 10, b = 20;
a = a + b; //int 是基础类型，编译器已经为这些类型提供+操作了。
//c1 = c1 + c2;
//c1的类型是 Complex，这种类型，是自定义类型。 编译器根本不知道如何加，
//但是c++编译器会给你提供一个机制，让你实现自定义类型加
system("pause");
}

Complex ComAdd(Complex &c1, Complex &c2)
{
Complex tmp;
tmp.a = c1.a + c2.a;
tmp.b = c1.b + c2.b;
return tmp;
}

Complex operator+(Complex &c1, Complex &c2)
{
Complex tmp;
tmp.a = c1.a + c2.a;
tmp.b = c1.b + c2.b;
return tmp;
}

void main()
{
Complex c1(1, 2), c2(3, 4);

//Complex c3 = ComAdd(c1, c2);
//Complex c3 = operator+(c1, c2);
Complex c3 = c1 + c2;

c3.printCom();

system("pause");
}