c++中->和.的區別

->用在指標類型的類執行個體的，而.用在執行個體化對象的指向。

下面是例子

#include <iostream>using namespace std;class Complex{private:double real;double image;public:Complex(){this->image=0;this->real=0;}Complex(double real,double image){this->real=real;this->image=image;}friend Complex operator+(Complex com1,Complex com2);void show();};Complex operator+(Complex com1,Complex com2){return Complex(com1.real+com2.real,com1.image+com2.image);//下面是錯誤的//return Complex(com1->real+com2->real,com1->image+com2->image);}void Complex::show(){cout<<"實數部分為"<<this->real<<endl;cout<<"虛數部分為"<<this->image<<endl;//下面是錯誤的//cout<<"實數部分為"<<this.real<<endl;//cout<<"虛數部分為"<<this.image<<endl;}int main(){Complex com1(2,5),com2(3,9),sum;sum=com1+com2;sum.show();system("pause");return 1;}