014--C++養成之路（運算符重載：插入提取運算符的重載）

筆記：插入提取運算符的友元函數重載。
#include<iostream>
using namespace std;
class Complex{//為什麼使用運算符重載
   int m_real;//解決複雜類型
   int m_vir;
   friend istream& operator>>(istream& in,Complex& c1);//插入運算符
   friend ostream& operator<<(ostream& out,Complex& c1);//提取運算符
public:
   Complex(int real=0,int vir=0):m_real(real),m_vir(vir){
   
   }
};
istream& operator>>(istream& in,Complex& c1){//友元重載插入運算符
   in>>c1.m_real>>c1.m_vir;
   return in;
}
ostream& operator<<(ostream& out,Complex& c1){//友元重載提取運算符
   out<<c1.m_real<<"+"<<c1.m_vir<<"i"<<endl;
   return out;
}
int main(){
   Complex cp1;
   cin>>cp1;
   cout<<cp1;
   getchar();
   system("pause");
   return 0;
}