// guess.cpp : Defines the entry point for the console application.
//

// Guess is a simple game where the player has 5 tries to guess a random number the computer chose.

#include <stdlib.h> /* Include srand and rand */
#include <stdio.h>  /* Include printf() */
#include <time.h>   /* Include time() */

/* Define constant values */

#define NUMBER_OF_TRIES 5                     // Guess the number 5 times until game over
#define TRIESLEFT       "You have %i tries left: "
#define TOOLOW          "Computer: The number you entered is too low\n"           // This is a polite computer that apologizes when you guess incorrectly
#define TOOHIGH         "Computer: The number you entererd is too high\n"
#define WINNER          "CONGRATULATIONS, You won, the number %i is correct!\n"
#define LOSER           "SORRY YOU LOST, The number I thought of was %d\n"

/* Define game variables */

int i,
    number,
    result,
    answer,
    tries = NUMBER_OF_TRIES;

/* GuessNumber(int n)
   Compare the number n with the number computer "thought" of and return a comparative answer

   Return value:
   ( -1 ) if the number is too low,
    ( 1 ) if the number is too high or
    ( 0 ) if the numbers match */

int GuessNumber(int n)
{
  int ret;  
  n == number ? ret = 0 : (n > number) ? ret = 1 : ret = -1;  
  return ret;
}

/* InitGame() 
   Let the computer pick a random number */

void InitGame()
{
  printf("InitGame()...\n");
  srand(time(NULL));   // Reset
  number = rand()%100; // Generate the random number
  printf( "Computer: I have thought of a number between 0 and 100. Can you guess it?\n", number);
}

/* Play() 
   This is where gameplay takes place */

void Play()
{
  printf("Play(): ");
  printf("Please enter the number below.\n");

  // Ask the player to guess the number, the number of times defined in 'tries' variable

  while ( tries ) {

    printf( TRIESLEFT, tries );

    result = scanf( "%d", &i );
    
    answer = GuessNumber(i);
    
    if (answer == 0) /* Correct answer */
    { 
      printf( WINNER, number ); return;
    }
    else
      answer < 0 ? printf( TOOLOW ) : printf( TOOHIGH );

    tries--;

  }

  // Game over,
  // At this point the player has exceeded the number of tries, and still hasn't guessed the number

   printf( LOSER, number );
}

/* Destroy() 
   This is where we would destroy allocated memory, etc.
   Because Guess is a very simple game, we have nothing to do here,
   But this would be an important step in an advanced computer game
 */

void Destroy()
{
  printf("DestroyGame()\n");
}

/* int main()
   Program entry point */

int main(int argc, char* argv[])
{
  InitGame();
  
  Play();
  
  Destroy();
	
  return 0;
}