43(function pointer 1)

#include<iostream>
using namespace std;
typedef int A;
typedef void (*PF)();
typedef int (*P_Adder)(double,long);

void hello()
{
    cout<<"hello"<<endl;
}

A inc(A x)
{
    return x+;
}

int adder(double x,long y)
{
    return x+y;
}

int main()
{
    PF pf;
    pf=hello;
    (*pf)();

    int (*p_inc)(int)=inc;
    cout<<(*p_inc)()<<endl;

    P_Adder p_adder=adder;
    cout<<(*p_adder)(,)<<endl;

    return ;
}