/**
 *  Copyright 2015 Natanael Russo <natanaelrusso18@hotmail.com>
 *
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
 *  "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell copies of the Software, and to
 *  permit persons to whom the Software is furnished to do so, subject to
 *  the following conditions:
 *
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
**/

#include <iostream>
using namespace std;

int Sum( int n1, int n2 )
{
    int r = n1 + n2;

    return r;
}

int main()
{
    // A function pointer called pSum1 that receives two int parameters and returns an int
    int (*pSum1)(int,int);

    pSum1 = Sum;

    cout<<"1. Use the function pointer like if was a normal function: "<<pSum1(3,4)<<endl<<endl;
    cout<<"2. Use the function pointer like if was a function pointer: "<<(*pSum1)(4,4)<<endl<<endl;

    // A type of a function pointer
    typedef  int (*PSum2)(int,int);

    PSum2 pSum2;

    pSum2 = Sum;

    // This is the same like the other example but the difference is the pointer function type
    cout<<"1. Use the function pointer like if was a normal function: "<<pSum2(3,4)<<endl<<endl;
    cout<<"2. Use the function pointer like if was a function pointer: "<<(*pSum2)(4,4)<<endl<<endl;

   // In this case I make a type definition
    typedef  int Sum3(int,int);

    Sum3* pSum3;

    pSum3 = Sum;

    cout<<"1. Use the function pointer like if was a normal function: "<<pSum3(3,4)<<endl<<endl;
    cout<<"2. Use the function pointer like if was a function pointer: "<<(*pSum3)(4,4)<<endl<<endl;

    return 0;
}