C++进阶 -类中成员和成员函数的动态调用_hawkol_新浪博客

在类中要实现动态调用，需要使用数字成员指针和成员函数指针。
#include

using namespace std;

class Transport

{

public:

Transport(double s,double w)

{

Speed=s;

Weight=w;

}

virtual ~Transport()

{

cout<<"in ~Transport!"<<endl;

}

void Move()

{

cout<<"in moving"<<"\nSpeed="<<Speed<<"\nWeight="<<Weight<<endl;

}

void setSpeed(double s)

{

Speed=s;

}

void setWeight(double w)

{

Weight=w;

}

double Speed;

double Weight;

};

typedef double Transport::*pdouble;//数字成员指针别名

typedef void (Transport::*pSub)(double);//带参成员函数指针别名

typedef void (Transport::*pMove)();//无参成员函数指针别名

void main()

{

Transport t(8.8,9.9);

//数字成员指针指向Speed;

pdouble pd=&Transport::Speed;

printf("pd=%d\n",pd);

cout<<"Speed="<<t.*pd<<endl;

//数字成员指针指向Weight;

pd=&Transport::Weight;

printf("pd=%d\n",pd);

cout<<"Weight="<<t.*pd<<endl;

Transport *pt=&t;

cout<<"调用带参成员函数指针指向setSpeed(double)"<<endl;;

pSub ps=&Transport::setSpeed;

(pt->*ps)(88.88);

cout<<"调用带参成员函数指针指向setWeight(double)"<<endl;;

pSub pw=&Transport::setWeight;

(pt->*pw)(99.99);

cout<<"调用无参成员函数指针指向Move()"<<endl;;

pMove pm=&Transport::Move;

(pt->*pm)();

}