mastermind_game_v1.c

/*
    mastermind_game_v1.c

    mastermind game
    https://en.wikipedia.org/wiki/Mastermind_(board_game)

    In this console game MasterMind
    Computer will be the codemaker and player will be the codebreaker.
    The computer picks a sequence of 4 numbers from 1 to 5.

    The object of the game is to guess the exact positions of the colors
    in the computer's sequence in as few guesses as possible.
    After each guess, the computer gives you a score of exact and partial matches.

    Here colors will be replaced by numbers 1 to 5.
    Colors (numbers) may be repeated in the code.

    In the score (results of guess)
    Correct color & position    X
    Correct color               O
    None                        -

    Rules:
    The sequence can contain colors (numbers) 1,2,3,4,5.
    A color (number) can be used any number of times in the sequence.
    All four colors of the secret sequence will contain a color,
    no blanks/empties are allowed.
    Each guess must consist of 4 colors, no blanks.
    The player has 6 guesses to find the secret sequence.

    In settings we can: ( simple change default values in main() )
    Choose the color code length (4 - 9), default 4.
    Choose the number of used colors in the game (1 - 9), default 5.
    Choose the maximum number of guesses the player has (4 - 9), default 6.


    Another mastermind game that is played using a mouse,
    exe file size 56 KB (language Serbian or Croatian or Bosnian)
    download from:
    https://mega.nz/file/64ZnXAKA#Sg8lML0S8RiwsY6n1GLYwLIx-2ScjRiFjfO1XibOwT8


    You can find all my C programs at Dragan Milicev's pastebin:

    https://pastebin.com/u/dmilicev

*/

#include <stdio.h>
#include <string.h>         // for strcpy()
#include <stdlib.h>         // for function rand()
#include <time.h>           // for time_t

// the computer imagines a secret code that the user will guess
void makeSecretCode( char secretCode[10], int color_code_length, int number_of_used_colors )
{
    int i;

    for(i=0; i<color_code_length; i++)                      // 48 is ASSCII code for '0'
        secretCode[i] = rand() % number_of_used_colors + 1 + 48;

    secretCode[i] = '\0';   // finish the string
}


// returns 1 if all colors are in their position, otherwise returns 0
int getScore( char guess[10], char secretCode[10],int color_code_length, int number_of_used_colors )
{
    int i, j, position=0, color=0;              // iterators and counters
    char tempGuess[10], tempSecretCode[10];

    strcpy(tempGuess, guess);                   // temporary, because we will change it
    strcpy(tempSecretCode, secretCode);

    for(i=0; i<color_code_length; i++)          // count score correct color & position (X)
        if( tempGuess[i] == tempSecretCode[i] )
        {
            position++;                         // count correct positon
            tempGuess[i] = tempSecretCode[i] = 'X'; // mark these positions with X
        }

    for(i=0; i<color_code_length; i++)          // count score correct color (O)
        for(j=0; j<color_code_length; j++)
            if( tempGuess[i] == tempSecretCode[j] && tempGuess[i] != 'X' )
            {
                color++;                        // count score color
                tempGuess[i] = tempSecretCode[j] = 'X'; // mark these positions with X
            }

    printf("\t\t\t   ");                        // spacing

    for(i=0; i<position; i++)                   // print score:
        printf("%c", 'X');                      // correct color & position

    for(i=0; i<color; i++)
        printf("%c", 'O');                      // correct color

    for(i=0; i<color_code_length-(position+color); i++)
        printf("%c", '-');                      // none

    printf("\n");

    if( position == color_code_length )
        return 1;                       // return 1 if all colors are in their position

    return 0;                           // otherwise return 0
} // getScore()


int main(void)
{                                       // counter and default values
    int attempt=0, color_code_length=4, number_of_used_colors=5, maximum_number_of_guesses=6;
    char secretCode[10], guess[10];     // strings to store variables
    time_t t;   // for random number generator, don't forget to #include <time.h>
    int i;                              // iterator

    srand((unsigned) time(&t)); // Intializes random number generator, should only be called once!

    // Title
    printf("\n MasterMind game \t\t author Dragan Milicev \n\n Guess %d numbers of ", color_code_length );
    for(i=0; i<number_of_used_colors; i++)
        printf(" %d", i+1 );
    printf("  in maximum %d attempts \n\n", maximum_number_of_guesses);

    // the computer imagines a secret code that the user will guess
    makeSecretCode( secretCode, color_code_length, number_of_used_colors );

//  printf(" SecretCode %s \n\n", secretCode);  // print the secret code imagined by computer

    while( attempt < maximum_number_of_guesses )
    {
        printf(" Enter your %d. guess: ", attempt+1 );
        scanf("%s", guess );                    // get guess from user

        attempt++;                              // count the attempts

        // getScore() returns 1 if all colors are in their position, otherwise returns 0
        if ( getScore( guess, secretCode, color_code_length, number_of_used_colors ) )
        {
            printf("\n You are the WINNER after %d attempts ! \n", attempt );
            break;                              // exit while() loop
        }
        else if( attempt == maximum_number_of_guesses ) // all attempts were used, print secret code
            printf("\nSorry, nothing hit from maximum %d attempts \n%s   was secretCode \n", attempt, secretCode);
    }

    return 0;

} // main()