wordle.c

#include <cs50.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

// each of our text files contains 1000 words
#define LISTSIZE 1000

// values for colors and score (EXACT == right letter, right place; CLOSE ==
// right letter, wrong place; WRONG == wrong letter)
#define EXACT 2
#define CLOSE 1
#define WRONG 0

// ANSI color codes for boxed in letters
#define GREEN "\e[38;2;255;255;255;1m\e[48;2;106;170;100;1m"
#define YELLOW "\e[38;2;255;255;255;1m\e[48;2;201;180;88;1m"
#define RED "\e[38;2;255;255;255;1m\e[48;2;220;20;60;1m"
#define RESET "\e[0;39m"

// user-defined function prototypes
string get_guess(int wordsize);
int check_word(string guess, int wordsize, int status[], string choice);
void print_word(string guess, int wordsize, int status[]);

int main(int argc, string argv[]) {
  // ensure proper usage
  // TODO #1
  if (argc != 2) {
    printf("Usage: ./wordle wordsize\n");
    return 1;
  }
  int wordsize = 0;

  // ensure argv[1] is either 5, 6, 7, or 8 and store that value in wordsize
  // instead
  // TODO #2
  wordsize = atoi(argv[1]);
  if (wordsize > 8 || wordsize < 5) {
    printf("Error: wordsize must be either 5, 6, 7, or 8\n");
    return 1;
  }

  // open correct file, each file has exactly LISTSIZE words
  char wl_filename[6];
  sprintf(wl_filename, "wordle_data/%i.txt", wordsize);
  FILE *wordlist = fopen(wl_filename, "r");
  if (wordlist == NULL) {
    printf("Error opening file %s.\n", wl_filename);
    return 1;
  }

  // load word file into an array of size LISTSIZE
  char options[LISTSIZE][wordsize + 1];

  for (int i = 0; i < LISTSIZE; i++) {
    fscanf(wordlist, "%s", options[i]);
  }

  // pseudorandomly select a word for this game
  srand(time(NULL));
  string choice = options[rand() % LISTSIZE];

  // allow one more guess than the length of the word
  int guesses = wordsize + 1;
  bool won = false;

  // print greeting, using ANSI color codes to demonstrate
  printf(GREEN "This is WORDLE50" RESET "\n");
  printf("You have %i tries to guess the %i-letter word I'm thinking of\n",
         guesses, wordsize);

  // main game loop, one iteration for each guess
  for (int i = 0; i < guesses; i++) {
    // obtain user's guess
    string guess = get_guess(wordsize);

    // array to hold guess status, initially set to zero
    int status[wordsize];

    // set all elements of status array initially to 0, aka WRONG
    // TODO #4
    for (int j = 0; j < wordsize; j++) {
      status[j] = 0;
    }

    // Calculate score for the guess
    int score = check_word(guess, wordsize, status, choice);

    printf("Guess %i: ", i + 1);

    // Print the guess
    print_word(guess, wordsize, status);

    // if they guessed it exactly right, set terminate loop
    if (score == EXACT * wordsize) {
      won = true;
      break;
    }
  }

  // Print the game's result
  // TODO #7
  if (won == true) {
    printf("You won!\n");
  } else {
    printf("The target word was: %s\n", choice);
  }

  // that's all folks!
  return 0;
}

string get_guess(int wordsize) {
  string guess = "";

  // ensure users actually provide a guess that is the correct length
  // TODO #3

  while (strlen(guess) != wordsize) {
    guess = get_string("Input a %i-letter word: ", wordsize);
  }
  return guess;
}

int check_word(string guess, int wordsize, int status[], string choice) {
  int score = 0;

  // compare guess to choice and score points as appropriate, storing points in
  // status
  // TODO #5

  for (int i = 0; i < wordsize; i++) {
    for (int j = 0; j < wordsize; j++) {
      if (guess[i] == choice[j]) {
        if (i == j) {
          status[i] = EXACT;
          score += EXACT;
          break;
        } else {
          status[i] = CLOSE;
          score += CLOSE;
        }
      }
    }
  }
  // HINTS
  // iterate over each letter of the guess
  //     iterate over each letter of the choice
  //         compare the current guess letter to the current choice letter
  //             if they're the same position in the word, score EXACT points
  //             (green) and break so you don't compare that letter further if
  //             it's in the word, but not the right spot, score CLOSE point
  //             (yellow)
  //     keep track of the total score by adding each individual letter's score
  //     from above

  return score;
}

void print_word(string guess, int wordsize, int status[]) {
  // print word character-for-character with correct color coding, then reset
  // terminal font to normal
  // TODO #6
  for (int i = 0; i < wordsize; i++) {
    switch (status[i]) {
      case EXACT:
        printf(GREEN "%c" RESET, guess[i]);
        break;
      case CLOSE:
        printf(YELLOW "%c" RESET, guess[i]);
        break;
      default:
        printf(RED "%c" RESET, guess[i]);
    }
  }
  printf("\n");
  return;
}