c++转换函数

#include "iostream"

using namespace std;

class Cgirl
{
public:
    int m_bianhao;
    string m_name;
    double m_weight;
//默认构造函数
    Cgirl(){m_bianhao=8 ;m_name="西施";m_weight=50.1;}
    explicit operator int(){return m_bianhao;}
    operator string(){return m_name;}
    operator double(){return m_weight;}
};

int main(){
    Cgirl g1;
    int a=int(g1);
    cout<<"a="<<a<<endl;
    string b=string(g1);
    cout<<"b="<<b<<endl;
    double c=double(g1);
    cout<<"c="<<c<<endl;
    short d=(int)g1;//显式转换
    //编译器发现了，int类型不可以用，自动用double来转换。
    int e=g1.operator int();
    cout<<"e="<<e<<endl;
    
}

输出：
a=8
b=西施
c=50.1
e=8