Step by Step solution about How to resolve the algorithm Wordle comparison step by step in the C programming language

This C program is a simple implementation of the popular word game Wordle. In Wordle, players have six tries to guess a five-letter word. After each guess, the game provides feedback in the form of colored tiles:

• Green: The letter is in the correct position.
• Yellow: The letter is in the word but in the wrong position.
• Gray: The letter is not in the word.

Here's a breakdown of the program:

Function wordle:

• Accepts three arguments:
  • answer: The secret word to guess.
  • guess: The player's guess.
  • result: An array to store the feedback for each letter in the guess.
• Compares the guess to the answer and sets the feedback accordingly:
  • If a letter in the guess matches a letter in the answer at the same position, it marks that letter as green (with a result of 2).
  • If a letter in the guess matches a letter in the answer but in a different position, it marks that letter as yellow (with a result of 1).
  • Otherwise, it marks the letter as gray (with a result of 0).

Main Function (main):

• Initializes arrays for the answer, guess, feedback numbers, and feedback colors.
• Defines five pairs of words to be used as test cases.
• Iterates through the word pairs and calls the wordle function for each pair.
• Prints the feedback for each pair, both as numbers (green: 2, yellow: 1, gray: 0) and as colored text ("green", "yellow", "gray").

Example Output:

ALLOW v LOLLY => { 2 0 2 1 0 } => { green grey green yellow grey }
BULLY v LOLLY => { 0 2 0 1 0 } => { grey green grey yellow grey }
ROBIN v ALERT => { 0 0 2 0 0 } => { grey grey green grey grey }
ROBIN v SONIC => { 0 0 0 2 0 } => { grey grey grey green grey }
ROBIN v ROBIN => { 2 2 2 2 2 } => { green green green green green }

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void wordle(const char *answer, const char *guess, int *result) {
    int i, ix, n = strlen(guess);
    char *ptr;
    if (n != strlen(answer)) {
        printf("The words must be of the same length.\n");
        exit(1);
    }
    char answer2[n+1];
    strcpy(answer2, answer);
    for (i = 0; i < n; ++i) {
        if (guess[i] == answer2[i]) {
            answer2[i] = '\v';
            result[i] = 2;
        }
    }
    for (i = 0; i < n; ++i) {
        if ((ptr = strchr(answer2, guess[i])) != NULL) {
            ix = ptr - answer2;
            answer2[ix] = '\v';
            result[i] = 1;
        }
    }
}

int main() {
    int i, j;
    const char *answer, *guess;
    int res[5];
    const char *res2[5];
    const char *colors[3] = {"grey", "yellow", "green"};
    const char *pairs[5][2] = {
        {"ALLOW", "LOLLY"},
        {"BULLY", "LOLLY"},
        {"ROBIN", "ALERT"},
        {"ROBIN", "SONIC"},
        {"ROBIN", "ROBIN"}
    };
    for (i = 0; i < 5; ++i) {
        answer = pairs[i][0];
        guess  = pairs[i][1];
        for (j = 0; j < 5; ++j) res[j] = 0;
        wordle(answer, guess, res);
        for (j = 0; j < 5; ++j) res2[j] = colors[res[j]];
        printf("%s v %s => { ", answer, guess);
        for (j = 0; j < 5; ++j) printf("%d ", res[j]);
        printf("} => { ");
        for (j = 0; j < 5; ++j) printf("%s ", res2[j]);
        printf("}\n");
    }
    return 0;
}