指向成员函数的指针

//
//  main.cpp
//  testvoidmain
//
//  Created by mac on 2019/4/11.
//  Copyright © 2019年 mac. All rights reserved.
//  1.只有成员函数才能有const限定符
//  2.脑袋怎么总是混乱
//  3.在类内部定义指向函数的指针有点蠢？

#include <iostream>

using namespace std;

template <class genType>
class classf{
public:
    classf(){
        
    }
    ~classf(){}
    genType fun1(genType &);
    genType (classf:: *p)(genType &)=&classf::fun1;

};

template<class genType>
genType classf<genType>::fun1(genType &a){
    return a;
}

int main(int argc, const char * argv[]) {
    
    
    classf<int> cf,*q=&cf;
    
    int a=3;
    cout<<cf.fun1(a)<<endl;
    
    cout<<(cf.*(cf.p))(a)<<endl;
    
    cout << "Hello, World!\n";
    return 0;
}

运行结果

3
3
Hello, World!
Program ended with exit code: 0