#include <iostream> 
#include "stdio.h" 
using namespace std; 
 
void fun1(){ 
   cout<<"1"<<endl; 
} 
 
void fun2(){ 
   cout<<"2"<<endl; 
} 
 
void fun3(){ 
   cout<<"3"<<endl; 
} 
 
void fun4(){ 
   cout<<"4"<<endl; 
} 
 
int main(){ 
   void (*f1[4])(); 
   f1[0] = &fun1; 
   f1[1] = &fun2; 
   f1[2] = &fun3; 
   f1[3] = &fun4; 
 
   (*(f1 + sizeof(f1)/sizeof(f1[0]) - 1))(); 
}