Application of Function Pointers learning Demo

Learn the application of function pointers, simple demo

#include "stdafx.h" #include "SubClass.h";//function pointer typedef int (*operation) (int a,int b);//define INT type function pointer typedef struct _str{ int result;operation opt;} STR;//A and b add int Add (int a, int b) {    return a + b;} A and B are multiplied by int Multi (int a, int b) {    return a * b;} int _tmain (int argc, _tchar* argv[]) {STR str;str.opt=add;str.result=str.opt (5,3);cout<< "5+3=" << Str.result<<endl;str.opt=multi;str.result=str.opt (5,3);cout<< "5*3=" <<str.result<<endl; return 0;}

　　

Application of Function Pointers learning Demo