Untitled

#include <stdlib.h>
#include <time.h>

int game(int);
int jackpot();

int main(int argc, char *argv[])
{
   static char buffer[20];
   static int (*function_ptr) (int user_pick);

   if(argc < 2)
   {
      printf("Usage: %s <a number 1 - 20>\n", argv[0]);
      printf("use %s help or %s -h for more help.\n", argv[0], argv[0]);
      exit(0);
   }

// Seed the randomizer
 srand(time(NULL));

// Set the function pointer to point to the game function.
 function_ptr = game;

// Print out some debug messages
   printf("---DEBUG--\n");
   printf("[before strcpy] function_ptr @ %p: %p\n",&function_ptr,function_ptr);
   strcpy(buffer, argv[1]);

   printf("[*] buffer @ %p: %s\n", buffer, buffer);
   printf("[after strcpy] function_ptr @ %p: %p\n",&function_ptr,function_ptr);

if(argc > 2)
   printf("[*] argv[2] @ %p\n", argv[2]);
   printf("----------\n\n");

// If the first argument is "help" or "-h" display a help message
   if((!strcmp(buffer, "help")) || (!strcmp(buffer, "-h")))
   {
      printf("Help Text:\n\n");
      printf("This is a game of chance.\n");
      printf("It costs 10 credits to play, which will be\n");
      printf("automatically deducted from your account.\n\n");
      printf("To play, simply guess a number 1 through 20\n");
      printf("    %s <guess>\n", argv[0]);
      printf("If you guess the number I am thinking of,\n");
      printf("you will win the jackpot of 100 credits!\n");
   }
   else
// Otherwise, call the game function using the function pointer
   {
      function_ptr(atoi(buffer));
   }
}

int game(int user_pick)
{
   int rand_pick;


   printf("Playing the game of chance..\n");
   printf("10 credits have been subtracted from your account\n");
/* <insert code to subtract 10 credits from an account> */

// Pick a random number from 1 to 20
   rand_pick = (rand()% 20) + 1;

   printf("You picked: %d\n", user_pick);
   printf("Random Value: %d\n", rand_pick);

// If the random number matches the user's number, call jackpot()
   if(user_pick == rand_pick)
      jackpot();
   else
      printf("Sorry, you didn't win this time..\n");
}

// Jackpot Function. Give the user 100 credits.
int jackpot()
{
   printf("You just won the jackpot!\n");
   printf("100 credits have been added to your account.\n");
   /* <insert code to add 100 credits to an account> */
}