Sams Teach Yourself C in 21 Days

Answers 867

F

16. a.zis an array of 10 pointers to characters.
    b.yis a function that takes an integer (field) as an argument and returns a
    pointer to a character.
    c.xis a pointer to a function that takes an integer (field) as an argument and
    returns a character.

Exercises

1.float (*func)(int field);

2.int (*menu_option[10])(char *title);

An array of function pointers can be used in conjunction with a menuing system.

The number selected from a menu could correspond to the array index for the

function pointer. For example, the function pointed to by the fifth element of the

array would be executed if item 5 were selected from the menu.

3.char *ptrs[10];

4.ptris declared as an array of 12 pointers to integers, not a pointer to an array of 12

integers. The correct code is

int x[3][12];

int (*ptr)[12];

ptr = x;

5. The following is one of many possible solutions:
   struct friend {
   char name[35+1];
   char street1[30+1];
   char street2[30+1];
   char city[15+1];
   char state[2+1];
   char zipcode[9+1];
   struct friend *next;
   }

Answers for Day 16

Quiz

1. A text-mode stream automatically performs translation between the newline char-
   acter (\n), which C uses to mark the end of a line, and the carriage-return linefeed
   character pair that DOS uses to mark the end of a line. In contrast, a binary-mode
   stream performs no translations. All bytes are input and output without modifica-
   tion.

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