From ac447157554906df8e6161d9acf91c25feb75905 Mon Sep 17 00:00:00 2001
From: vafan <vadym.afanasiev@student.tuke.sk>
Date: Thu, 16 Apr 2026 20:36:48 +0000
Subject: [PATCH] new

---
 du4/README.md |   1 +
 du4/snake.c   | 219 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 220 insertions(+)
 create mode 100644 du4/README.md
 create mode 100644 du4/snake.c

diff --git a/du4/README.md b/du4/README.md
new file mode 100644
index 0000000..9aa2078
--- /dev/null
+++ b/du4/README.md
@@ -0,0 +1 @@
+Na túto úlohu som použil copilot a Claude Haiku 4.
\ No newline at end of file
diff --git a/du4/snake.c b/du4/snake.c
new file mode 100644
index 0000000..7669e8d
--- /dev/null
+++ b/du4/snake.c
@@ -0,0 +1,219 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+#define FOOD_COUNT 5
+#define WIDTH 20
+#define HEIGHT 10
+
+struct snake {
+    int x;
+    int y;
+    struct snake* next;
+};
+
+enum endgame {
+    END_CONTINUE = 0,
+    END_WALL,
+    END_SNAKE,
+    END_FOOD,
+    END_USER
+};
+
+struct state {
+    struct snake* snake;
+    int foodx[FOOD_COUNT];
+    int foody[FOOD_COUNT];
+    int sx;
+    int sy;
+    int width;
+    int height;
+};
+
+struct snake* add_snake(struct snake* snake, int x, int y);
+struct snake* remove_snake(struct snake* snake);
+int is_snake(struct snake* snake, int x, int y);
+void free_snake(struct snake* sn);
+int step_state(struct state* state);
+
+void display_game(struct state* state);
+void start_game(struct state* game);
+
+struct snake* add_snake(struct snake* snake, int x, int y) {
+    struct snake* new_part = (struct snake*)malloc(sizeof(struct snake));
+    new_part->x = x;
+    new_part->y = y;
+    new_part->next = snake;
+    return new_part;
+}
+
+struct snake* remove_snake(struct snake* snake) {
+    if (snake == NULL) {
+        return NULL;
+    }
+    
+    if (snake->next == NULL) {
+        free(snake);
+        return NULL;
+    }
+    
+    struct snake* current = snake;
+    while (current->next != NULL && current->next->next != NULL) {
+        current = current->next;
+    }
+    
+    if (current->next != NULL) {
+        free(current->next);
+        current->next = NULL;
+    }
+    
+    return snake;
+}
+
+int is_snake(struct snake* snake, int x, int y) {
+    struct snake* current = snake;
+    while (current != NULL) {
+        if (current->x == x && current->y == y) {
+            return 1;
+        }
+        current = current->next;
+    }
+    return 0;
+}
+
+void free_snake(struct snake* sn) {
+    while (sn != NULL) {
+        struct snake* temp = sn;
+        sn = sn->next;
+        free(temp);
+    }
+}
+
+int step_state(struct state* state) {
+    int newX = state->snake->x + state->sx;
+    int newY = state->snake->y + state->sy;
+    
+    if (newX < 0 || newX >= state->width || newY < 0 || newY >= state->height) {
+        return END_WALL;
+    }
+    
+    if (is_snake(state->snake->next, newX, newY)) {
+        return END_SNAKE;
+    }
+    
+    int foodIdx = -1;
+    for (int i = 0; i < FOOD_COUNT; i++) {
+        if (state->foodx[i] == newX && state->foody[i] == newY) {
+            foodIdx = i;
+            break;
+        }
+    }
+    
+    if (foodIdx != -1) {
+        state->foodx[foodIdx] = -1;
+        state->foody[foodIdx] = -1;
+        
+        state->snake = add_snake(state->snake, newX, newY);
+        
+        int foodLeft = 0;
+        for (int i = 0; i < FOOD_COUNT; i++) {
+            if (state->foodx[i] >= 0) {
+                foodLeft = 1;
+                break;
+            }
+        }
+        
+        return foodLeft ? END_CONTINUE : END_FOOD;
+    }
+    
+    state->snake = add_snake(state->snake, newX, newY);
+    state->snake = remove_snake(state->snake);
+    
+    return END_CONTINUE;
+}
+
+void display_game(struct state* game) {
+    system("clear");
+    printf("SNAKE GAME - Simple Version\n");
+    printf("================================\n\n");
+    
+    for (int x = 0; x < WIDTH + 2; x++) printf("#");
+    printf("\n");
+    
+    for (int y = 0; y < HEIGHT; y++) {
+        printf("#");
+        for (int x = 0; x < WIDTH; x++) {
+            int head = (game->snake->x == x && game->snake->y == y);
+            int body = is_snake(game->snake->next, x, y);
+            int food = 0;
+            
+            for (int i = 0; i < FOOD_COUNT; i++) {
+                if (game->foodx[i] == x && game->foody[i] == y) {
+                    food = 1;
+                    break;
+                }
+            }
+            
+            if (head) printf("S");
+            else if (body) printf("+");
+            else if (food) printf("F");
+            else printf(" ");
+        }
+        printf("#\n");
+    }
+    
+    for (int x = 0; x < WIDTH + 2; x++) printf("#");
+    printf("\n");
+}
+
+void start_game(struct state* game) {
+    game->snake = add_snake(NULL, WIDTH / 2, HEIGHT / 2);
+    game->snake = add_snake(game->snake, WIDTH / 2 - 1, HEIGHT / 2);
+    
+    game->sx = 1;
+    game->sy = 0;
+    game->width = WIDTH;
+    game->height = HEIGHT;
+    
+    srand(time(NULL));
+    for (int i = 0; i < FOOD_COUNT; i++) {
+        game->foodx[i] = rand() % WIDTH;
+        game->foody[i] = rand() % HEIGHT;
+    }
+}
+
+int main(void) {
+    struct state game;
+    start_game(&game);
+    
+    int playing = 1;
+    int tick = 0;
+    
+    while (playing) {
+        display_game(&game);
+        
+        tick++;
+        if (tick >= 3) {
+            tick = 0;
+            int status = step_state(&game);
+            
+            if (status == END_WALL) {
+                printf("CRASH into wall!\n");
+                playing = 0;
+            } else if (status == END_SNAKE) {
+                printf("CRASH into yourself!\n");
+                playing = 0;
+            } else if (status == END_FOOD) {
+                printf("You ate all food. Good job!\n");
+                playing = 0;
+            }
+        }
+        
+        usleep(80000);
+    }
+    
+    free_snake(game.snake);
+    
+    return 0;
+}