/* ----------------------------------------------------------------------  
//  Figure 16.2:  A carnival game.                                         
//  Figure 16.3:  Masked menu function for the carnival game.              
//  --------------------------------------------------------------------- 
*/
#include "tools.h"
                                                     
#define PRIZES 10
typedef struct ITEMS { char name[20]; int price; } item;
int choose ( item inventory[],  bool mask[] );

void main ( void )                                     
{   
    int count = 0, total = 0;   /* Number and value of prizes selected so far. */
    int pick;                   /* Player's selection. */
    char yesno;                 /* Continue or quit flag. */
    int max;                    /* Player's random limit. */

    item inventory [PRIZES] = { {"ball",5}, {"bear",15}, 
        {"doll",10}, {"gorilla",15}, {"hat",1}, {"kazoo",3}, 
        {"lollypop",3}, {"spider",1}, {"squirt gun",10}, {"stickers",1} 
    };
    bool mask[PRIZES] = {true,true,true,true,true,true,true,true,true,true};

    banner();
    puts( " Prize Giveaway Game" );

    max = (time( NULL) %  10) + 6;   /* Choose the random goal. */
    // printf( " max = %i\n", max);  /* For debugging only. */ 
 
    for (yesno = 'y'; tolower( yesno ) == 'y'; scanf( " %c", &yesno )) {
        pick = choose( inventory, mask );   
        total += inventory[pick].price;
        if (total > max) break;
        ++count;
        printf( " Do you want to keep going? " );
    }

    if (total > max) printf( " You ran out of luck!  You lose.\n" );
    else printf( " You are a lucky stiff! \n"
                 " You have %i prizes worth %i tickets!\n", count, total );
    bye();
} 

/*----------------------------------------------------------- */
int
choose ( item inventory[], bool mask[] ) 
{
    int k;
    puts( "\n Here are the remaining prizes:" );
    for (k = 0; k < PRIZES; ++k) 
        if (mask[k]) printf( "%2i: %s\n",  k, inventory[k].name );

    printf( " Your choice? " );
    scanf( "%i", &k );
    while (k < 0 || k >= PRIZES || mask[k] == false) {
        puts( " Hey, can't you read? Choose a number on the list!" );
        scanf( "%i", &k );
    }
    mask[k] = false;
    return k;
}
/*----------------------------------------------------------- */
/* Output
 -------------------------------------------------------
         Patience S. Goodenough 
         CS 110 
         Fri Aug 27 1999  10:35:01
 -------------------------------------------------------
 Prize Giveaway Game

 Here are the remaining prizes:
 0: ball
 1: bear
 2: doll
 3: gorilla
 4: hat
 5: kazoo
 6: lollypop
 7: spider
 8: squirt gun
 9: stickers
 Your choice? 1
 You ran out of luck!  You lose.


 Normal termination.
 -------------------------------------------------------
         Patience S. Goodenough 
         CS 110 
         Fri Aug 27 1999  10:35:28
 -------------------------------------------------------
 Prize Giveaway Game

 Here are the remaining prizes:
 0: ball
 1: bear
 2: doll
 3: gorilla
 4: hat
 5: kazoo
 6: lollypop
 7: spider
 8: squirt gun
 9: stickers
 Your choice? 2
 Do you want to keep going? n
 You are a lucky stiff! 
 You have 1 prizes worth 10 tickets!


 Normal termination.
 -------------------------------------------------------
         Patience S. Goodenough 
         CS 110 
         Fri Aug 27 1999  10:35:28
 -------------------------------------------------------
 Prize Giveaway Game

 Here are the remaining prizes:
 0: ball
 1: bear
 2: doll
 3: gorilla
 4: hat
 5: kazoo
 6: lollypop
 7: spider
 8: squirt gun
 9: stickers
 Your choice? 2
 Do you want to keep going? n
 You are a lucky stiff! 
 You have 1 prizes worth 10 tickets!


 Normal termination.
(beth:0.658)~/appliedc/ccode/ch_16_arrays> carn


 -------------------------------------------------------
         Patience S. Goodenough 
         CS 110 
         Fri Aug 27 1999  10:35:53
 -------------------------------------------------------
 Prize Giveaway Game

 Here are the remaining prizes:
 0: ball
 1: bear
 2: doll
 3: gorilla
 4: hat
 5: kazoo
 6: lollypop
 7: spider
 8: squirt gun
 9: stickers
 Your choice? 0
 Do you want to keep going? y

 Here are the remaining prizes:
 1: bear
 2: doll
 3: gorilla
 4: hat
 5: kazoo
 6: lollypop
 7: spider
 8: squirt gun
 9: stickers
 Your choice? 4
 Do you want to keep going? y

 Here are the remaining prizes:
 1: bear
 2: doll
 3: gorilla
 5: kazoo
 6: lollypop
 7: spider
 8: squirt gun
 9: stickers
 Your choice? 5
 Do you want to keep going? y

 Here are the remaining prizes:
 1: bear
 2: doll
 3: gorilla
 6: lollypop
 7: spider
 8: squirt gun
 9: stickers
 Your choice? 7
 You ran out of luck!  You lose.


 Normal termination.
 -------------------------------------------------------
         Patience S. Goodenough 
         CS 110 
         Fri Aug 27 1999  10:36:56
 -------------------------------------------------------
 Prize Giveaway Game

 Here are the remaining prizes:
 0: ball
 1: bear
 2: doll
 3: gorilla
 4: hat
 5: kazoo
 6: lollypop
 7: spider
 8: squirt gun
 9: stickers
 Your choice? 0
 Do you want to keep going? y

 Here are the remaining prizes:
 1: bear
 2: doll
 3: gorilla
 4: hat
 5: kazoo
 6: lollypop
 7: spider
 8: squirt gun
 9: stickers
 Your choice? 5
 Do you want to keep going? y

 Here are the remaining prizes:
 1: bear
 2: doll
 3: gorilla
 4: hat
 6: lollypop
 7: spider
 8: squirt gun
 9: stickers
 Your choice? 7
 Do you want to keep going? n
 You are a lucky stiff! 
 You have 3 prizes worth 9 tickets!


 Normal termination.
 -------------------------------------------------------
         Patience S. Goodenough 
         CS 110 
         Fri Aug 27 1999  11:25:43
 -------------------------------------------------------
 Prize Giveaway Game

 Here are the remaining prizes:
 0: ball
 1: bear
 2: doll
 3: gorilla
 4: hat
 5: kazoo
 6: lollypop
 7: spider
 8: squirt gun
 9: stickers
 Your choice? 10
 Hey, can't you read? Choose a number on the list, sap!
-1
 Hey, can't you read? Choose a number on the list, sap!
3
 You ran out of luck!  You lose.


 Normal termination.