info2Praktikum-Wortsalat/Startcode/game.c

#include "game.h"
#include <time.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#define MAX_RAND_TRIES_PER_WORD 10
#define EMPTY_CHAR 0

int placeWord(int len, int column, int row,
              char salad[MAX_SEARCH_FIELD_LEN][MAX_SEARCH_FIELD_LEN],
              int searchFieldLen, const char* word, int axis);

// Creates the word salad by placing words randomly and filling empty spaces
int createWordSalad(
    char salad[MAX_SEARCH_FIELD_LEN][MAX_SEARCH_FIELD_LEN],
    unsigned int searchFieldLen,
    const char words[][MAX_WORD_LEN],
    unsigned int wordCount)
{
    if (searchFieldLen == 0 || searchFieldLen > MAX_SEARCH_FIELD_LEN)
        return 0;

    int placedWords = 0;

    srand(time(NULL));

    // Spielfeld leeren:
    for (int x = 0; x < searchFieldLen; x++)
        for (int y = 0; y < searchFieldLen; y++)
            salad[x][y] = EMPTY_CHAR;


    // Wörter platzieren
    for (int w = 0; w < wordCount; w++)
    {
        int wordlenght = strlen(words[w]); // Wortlänge festgelegt

        if (wordlenght == 0 || wordlenght > searchFieldLen)
            continue;

        for (int attempts = 0;
             attempts < MAX_RAND_TRIES_PER_WORD;
             attempts++)
        {
            // Muss in for-Schleife sein damit immer neu erzeugt wird
            int axis = rand() % 2;
            int row = rand() % searchFieldLen;
            int column = rand() % searchFieldLen;

            int success = placeWord(
                wordlenght, column, row, salad,
                searchFieldLen, words[w], axis);

            if (success)
            {
                placedWords++;
                break;
            }

            printf("Platzierung zum %d. Mal fehlgeschlagen!\n",
                   attempts + 1);
        }
    }

    //Fill empty spaces
    for (int r = 0; r < searchFieldLen; r++)
    {
        for (int c = 0; c < searchFieldLen; c++)
        {
            if (salad[r][c] == EMPTY_CHAR)
            {
                salad[r][c] = 'A' + rand() % 26;
            }
        }
    }
    printf("%d placed" ,placedWords);
    return placedWords;
}


int placeWord(int len, int column, int row,
              char salad[MAX_SEARCH_FIELD_LEN][MAX_SEARCH_FIELD_LEN],
              int searchFieldLen, const char* word, int axis)
{
    // Available space check & word collision avoidance
    for (int i = 0; i < len; i++)
    {
        if (axis == 0) // Horizontal
        {
            if (column + len > searchFieldLen ||
                salad[row][column + i] != EMPTY_CHAR)
            {
                return 0;
            }
        }
        else // Vertical
        {
            if (row + len > searchFieldLen ||
                salad[row + i][column] != EMPTY_CHAR)
            {
                return 0;
            }
        }
    }

    //Write Word
    for (int i = 0; i < len; i++)
    {
        if (axis == 0) // Horizontal
        {
            salad[row][column + i] = word[i];
        }
        else // Vertical
        {
            salad[row + i][column] = word[i];
        }
    }

    return 1;
}