123

a2/snake.c

@@ -1,57 +1,48 @@
-struct snake* add_snake(struct snake* old_head, int x, int y) {
-    struct snake* new_head = (struct snake*) malloc(sizeof(struct snake));
-    new_head->x = x;
-    new_head->y = y;
-    new_head->next = old_head;
-    return new_head;
+#include <stdio.h>
+#include <time.h>
+
+// Inicializuje stav hry
+void init_state(struct state* state, int width, int height) {
+    state->width = width;
+    state->height = height;
+    state->snake = add_snake(NULL, width / 2, height / 2);
+    state->sx = 0;
+    state->sy = 1;
+    for(int i = 0; i < FOOD_COUNT; i++) {
+        state->foodx[i] = rand() % width;
+        state->foody[i] = rand() % height;
+    }
 }
 
-int is_snake(struct snake* snake, int x, int y) {
-    while (snake != NULL) {
-        if (snake->x == x && snake->y == y) {
-            return 1;
+// Generuje nové jedlo na náhodnej pozícii
+void generate_food(struct state* state) {
+    for(int i = 0; i < FOOD_COUNT; i++) {
+        if(state->foodx[i] == -1) {
+            state->foodx[i] = rand() % state->width;
+            state->foody[i] = rand() % state->height;
         }
-        snake = snake->next;
     }
+}
+
+// Hlavná slučka hry
+void game_loop(struct state* state) {
+    while(1) {
+        int result = step_state(state);
+        if(result == END_WALL || result == END_SNAKE) {
+            break;
+        }
+        if(result == END_FOOD) {
+            generate_food(state);
+        }
+        // TODO: Pridajte kód pre vykreslenie hry a spracovanie vstupu od hráča
+    }
+}
+
+int main() {
+    srand(time(NULL));
+    struct state state;
+    init_state(&state, 20, 20);
+    game_loop(&state);
+    free_snake(state.snake);
     return 0;
 }
-
-void free_snake(struct snake* snake) {
-    while (snake != NULL) {
-        struct snake* next = snake->next;
-        free(snake);
-        snake = next;
-    }
-}
-
-int step_state(struct state* state) {
-    int new_x = state->snake->x + state->sx;
-    int new_y = state->snake->y + state->sy;
-
-    if (new_x < 0 || new_x >= state->width || new_y < 0 || new_y >= state->height) {
-        return END_WALL;
-    }
-
-    if (is_snake(state->snake->next, new_x, new_y)) {
-        return END_SNAKE;
-    }
-
-    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;
-            state->snake = add_snake(state->snake, new_x, new_y);
-            return END_FOOD;
-        }
-    }
-
-    state->snake = add_snake(state->snake, new_x, new_y);
-    struct snake* tail = state->snake;
-    while (tail->next->next != NULL) {
-        tail = tail->next;
-    }
-    free(tail->next);
-    tail->next = NULL;
-
-    return END_CONTINUE;
-}