A game of guessing 5-letter words (prototype)

5.c

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <process.h>
#include <time.h>
#include <string.h>

#define LETTER_CNT 5

typedef enum {
	NO_LETTER, HAS_LETTER, OK_LETTER
} LetterStatus;

typedef struct {
	LetterStatus status[LETTER_CNT];
	size_t ok_cnt;
} WordStatus;

typedef struct {
	char letters[LETTER_CNT + 1];
} InputWord;

static const char* words[10] = {
	"apple", "haven", "begin", "peach", "rotor",
	"spray", "scout", "melon", "grass", "berry"
};

const char* get_random_word(const char** words, size_t word_cnt)
{
	size_t rand_index = rand() * (word_cnt - 1) / RAND_MAX;
	return words[rand_index];
}

uint32_t get_letter(const char* word, size_t index)
{
	return word[index];
}

uint8_t has_letter(const char* word, uint32_t test_letter)
{
	for (size_t i = 0; i < LETTER_CNT; i++) {
		uint32_t letter = get_letter(word, i);
		if (letter == test_letter) {
			return 1;
		}
	}
	return 0;
}

WordStatus check_word(const char* word, const char* test_word)
{
	WordStatus ws = { .ok_cnt = 0 };
	for (size_t i = 0; i < LETTER_CNT; i++) {
		uint32_t letter = get_letter(word, i);
		uint32_t test_letter = get_letter(test_word, i);
		if (letter == test_letter) {
			// есть на своём месте
			ws.status[i] = OK_LETTER;
			ws.ok_cnt++;
		} else if (has_letter(word, test_letter)) {
			// есть в другом месте
			ws.status[i] = HAS_LETTER;
		} else {
			// нет вообще
			ws.status[i] = NO_LETTER;
		}
	}
	return ws;
}

void print_status(WordStatus* ws)
{
	const char status_display[3] = { 'x', '-', '+' };

	for (size_t i = 0; i < LETTER_CNT; i++) {
		printf("%c", status_display[ws->status[i]]);
	}
	printf("\n");	
}

InputWord get_word()
{
	InputWord input; 
	fgets(input.letters, sizeof(input.letters), stdin);
	if (input.letters[strlen(input.letters) - 1] != '\n') {
		// читать остаток во временный буфер
		char buf[100];
		do {
			fgets(buf, sizeof(buf), stdin);
		} while (buf[strlen(buf) - 1] != '\n');
	}
	return input;
}

int main()
{
	srand(time(NULL) ^ getpid());
	size_t word_cnt = 10;

	InputWord input;
	WordStatus ws;
	while (1) {
		const char* word = get_random_word(words, word_cnt);
		for (int try_cnt = 1; try_cnt < 7; try_cnt++) {
			printf("try #%u: ", try_cnt);
			input = get_word();
			ws = check_word(word, input.letters);
			printf("%s\n", input.letters);
			print_status(&ws);
			if (ws.ok_cnt == LETTER_CNT) {
				break;
			}
		}
		if (ws.ok_cnt == LETTER_CNT) {
			printf("YOU WON!\n");
		} else {
			printf("YOU LOST!\n");
		}
	}
}