Extracting Hand structures and functions

Just as we extracted the typedef, enum, and struct instances, along with the functions for the Card structure, we will do the same for Hand structures, as follows:

1. Create and open the hand.h header file and put in the following new lines:

#ifndef _HAND_H_
#define _HAND_H_

#endif 

This is our starting point for this header file. Looking again through carddeck.c, we see that there are a couple of const int types related to Hand that we need to add as enum instances, as follows:

enum {
 kCardsInHand = 5,
 kNumHands = 4
};

2. We can next add the typedef struct { … } Hand; declaration and the 4 function definitions related to the Hand structure: InitializeHand(), AddCardToHand(), PrintHand(), and PrintAllHands(). However, notice that a parameter to one of these functions is a Card* parameter, therefore the compiler will need to know about...