refresh

du5/snake.c

@@ -65,40 +65,45 @@ int is_snake(struct snake* snake, int x, int y) {
 }
 
 int step_state(struct state* state) {
-    int new_x = state->snake->x + state->sx;
-    int new_y = state->snake->y + state->sy;
+    int x = state->snake->x + state->sx;
+    int 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 (x < 0) return END_WALL;
+    if (x >= state->width) return END_WALL;
+    if (y < 0) return END_WALL;
+    if (y >= state->height) return END_WALL;
 
-    if (is_snake(state->snake, new_x, new_y)) {
+    if (is_snake(state->snake, x, 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);
-
-            int any_food_left = 0;
-            for (int j = 0; j < FOOD_COUNT; j++) {
-                if (state->foodx[j] >= 0 && state->foody[j] >= 0) {
-                    any_food_left = 1;
-                    break;
-                }
-            }
-            if (any_food_left) {
-                return END_CONTINUE;
-            } else {
-                return END_FOOD;
-            }
+    int food_found = -1;
+    for (int idx = 0; idx < FOOD_COUNT; idx++) {
+        if (state->foodx[idx] == x && state->foody[idx] == y) {
+            food_found = idx;
+            break;
         }
     }
-    state->snake = add_snake(state->snake, new_x, new_y);
+
+    if (food_found != -1) {
+        state->foodx[food_found] = -1;
+        state->foody[food_found] = -1;
+        state->snake = add_snake(state->snake, x, y);
+
+        int remaining = 0;
+        for (int k = 0; k < FOOD_COUNT; ++k) {
+            remaining += (state->foodx[k] >= 0 && state->foody[k] >= 0);
+        }
+
+        if (remaining == 0) {
+            return END_FOOD;
+        }
+        return END_CONTINUE;
+    }
+
+    state->snake = add_snake(state->snake, x, y);
     state->snake = remove_snake(state->snake);
+
     return END_CONTINUE;
 }