#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 randomizersrand(time(NULL));// set the function pointer to point to the game functionfunction_ptr = game;// Print out some debug message printf("---DEBUG--\n"); printf("[before 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 gues 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;// Make sure the user picks a number from 1 to 20 if((user_pick < 1) || (user_pick > 20)) { printf("You must pick a value from 1 - 20\n"); printf("Use help or -h for help\n"); return; } printf("Playing the game of chance..\n") printf("10 credits have been substracted from your account\n");/* insert code to subtract 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 didnt win this time..\n");// jackpot fucntion gave the user 100 creditsint jackpot{ printf("You just won the jackpot!\n"); printf("100 credits ahve been added to your account.\n"); /* <insert code to add 100 credits to an account> */}