CS 131 PRACTICE WITH VARIABLES AND FUNCTIONS

1. What data structure is appropriate for the following? Write declarations.
   a. A person's name

        string name;

   b. The names of all my friends

        const int MAX_FRIENDS = 200;
        string friends[MAX_FRIENDS];
        int numFriends;

   c. The names and address for one of my friends

        struct Address{
           string street;
           string city;
           string state;
        }

        struct Friend{
           string name;
           Address address;
        }
   d. The names and addresses for all of my friends

        const int MAX_FRIENDS = 200;
        Friend friends[MAX_FRIENDS];
        int numFriends;


   e. For each of my 10 friends, whom she tolerates. 

        bool tolerates[10][10]
  


2. Write the headings for each of the following functions. Assume the declarations
   above.

   a. Initializing the list of my friends from data in a file.

      void get_data(Friend friends[], int& numFriends);


   b. Printing the names of all my friends.

      void print_data(const Friend friends[], int numFriends);


   c. Determining how many of my friends live in a given state.

      int friends_by_state(const Friend friends[], int numFriends, string state));


      Assuming state is local to the function:

      int friends_by_state(const Friend friends[], int numFriends);


   d. Editing an address for one of my friends (she moved).

      void edit_data(Friend friends[], int numFriends);


   e. Adding a friend.

      void add_friend(Friend friends[], int& numFriends);


   f. Printing the list of all my friends who tolerate each other

      void tolerate_each_other(bool tolerates[10] [10]);