Tutorial - C / C++ - Function Pointers

#include <iostream>

using namespace std;

void f()
{
       cout << "hi" << endl;       
}

void g()
{
       cout << "bye" << endl;
}

// always set the function pointer to NULL.
void (*func)() = NULL;

// to pass a function pointer to a function.
void callFunc( void (*function)())
{
       function();
}

int main(int argc, char* argv[])
{
       // set the func object (as created above – void (*func)() = NULL; - to the function address f)
       func=&f;
       // call the function that is assoicated with the func pointer
       func();
       // reset to another function.
       func=&g;
       func();

       // call the function pointed to within another function.
       callFunc(func);
       return 0;
}