#include "wvcallback.h"
#include <stdio.h>

//Declare a new type of WvCallback called WvMath
//This WvCallbak can point to functions that take 2 input parameters, both of 
//type integer, and returns an integer value.
DeclareWvCallback(2, int, WvMath, int, int);

class Math
{
    public:
	int addition(int a, int b);
};

int Math::addition(int a, int b)
{
    return a+b;
}

    
int main()
{
    WvMath callback(NULL); //Declare a WvCallback of type WvMath
    Math object;
    callback = wvcallback(WvMath, object, Math::addition); //Here callback becomes a pointer 
    //to the member function (addition) that belongs to the WvMath class

    int answer = callback(5, 6); //Bind input parameter values to callback, 
    //same way as we bind values to the addition function.

    printf("answer = %d\n", answer);
    
}