pvjc24/a2/snake.c

#include "snake.h"
#include <stdlib.h>
#include <time.h>
#include <stdio.h>

#define WIDTH 20
#define HEIGHT 10

void initialize_food(int foodx[], int foody[]) {
    srand(time(NULL));
    for (int i = 0; i < FOOD_COUNT; i++) {
        foodx[i] = rand() % WIDTH;
        foody[i] = rand() % HEIGHT;
    }
}

void print_world(struct state* state) {
    for (int y = 0; y < HEIGHT; y++) {
        for (int x = 0; x < WIDTH; x++) {
            if (is_snake(state->snake, x, y)) {
                printf("x");
            } else {
                int food_found = 0;
                for (int i = 0; i < FOOD_COUNT; i++) {
                    if (state->foodx[i] == x && state->foody[i] == y) {
                        if (state->foodx[i] >= 0 && state->foody[i] >= 0) {
                            printf("*");
                        } else {
                            printf(" ");
                        }
                        food_found = 1;
                        break;
                    }
                }
                if (!food_found) {
                    printf(" ");
                }
            }
        }
        printf("\n");
    }
}

void move_snake(struct state* state, int dx, int dy) {
    // Update snake position according to the direction
    int new_x = state->snake->x + dx;
    int new_y = state->snake->y + dy;

    // Check if the new position is out of bounds
    if (new_x < 0 || new_x >= WIDTH || new_y < 0 || new_y >= HEIGHT) {
        printf("Snake hit the wall!\n");
        exit(EXIT_SUCCESS);
    }

    // Check if the new position is on the snake
    if (is_snake(state->snake, new_x, new_y)) {
        printf("Snake hit itself!\n");
        exit(EXIT_SUCCESS);
    }

    // Check if the new position is on food
    for (int i = 0; i < FOOD_COUNT; i++) {
        if (state->foodx[i] == new_x && state->foody[i] == new_y) {
            state->foodx[i] = -1;
            state->foody[i] = -1;
            // Grow the snake
            struct snake* new_head = add_snake(state->snake, new_x, new_y);
            if (new_head == NULL) {
                printf("Memory allocation failed!\n");
                exit(EXIT_FAILURE);
            }
            state->snake = new_head;
            return;
        }
    }

    // Move the snake
    struct snake* new_head = add_snake(state->snake, new_x, new_y);
    if (new_head == NULL) {
        printf("Memory allocation failed!\n");
        exit(EXIT_FAILURE);
    }
    state->snake = new_head;
    remove_snake(state->snake);
}

int main() {
    // Initialize game state
    struct state game_state;
    game_state.snake = add_snake(NULL, WIDTH / 2, HEIGHT / 2);
    if (game_state.snake == NULL) {
        printf("Memory allocation failed!\n");
        return EXIT_FAILURE;
    }
    game_state.width = WIDTH;
    game_state.height = HEIGHT;
    game_state.sx = 1;
    game_state.sy = 0;
    initialize_food(game_state.foodx, game_state.foody);

    // Main game loop
    while (1) {
        system("clear"); // Clear the console
        print_world(&game_state);
        
        // Check if all food is eaten
        int food_eaten = 1;
        for (int i = 0; i < FOOD_COUNT; i++) {
            if (game_state.foodx[i] >= 0 && game_state.foody[i] >= 0) {
                food_eaten = 0;
                break;
            }
        }
        if (food_eaten) {
            printf("All food eaten! You win!\n");
            break;
        }

        // Move the snake according to the direction
        move_snake(&game_state, game_state.sx, game_state.sy);

        // Delay for a short time to slow down the game
        // Adjust this value to change the game speed
        usleep(200000); // 200 milliseconds
    }

    // Free memory
    free_snake(game_state.snake);

    return EXIT_SUCCESS;
}