11111

a2/snake.c

@@ -1,83 +1,118 @@
-#include "snake.h"
+#include <stdio.h>
 #include <stdlib.h>
+#include <conio.h> 
 
-#define FOOD_COUNT 20
+#define WIDTH 20
+#define HEIGHT 20
+#define FOOD_COUNT 3
 
-struct state {
-    struct snake* snake;
-    int sx, sy;
-    int width, height;
-    int foodx[FOOD_COUNT], foody[FOOD_COUNT];
+enum EndGame { END_WALL, END_SNAKE, END_FOOD, END_CONTINUE };
+
+struct snake {
+    int x, y;
+    struct snake* next;
 };
 
-struct snake* add_snake(struct snake* snake, 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 = snake;
-    return new_head;
-}
+struct state {
+    int width, height;
+    int sx, sy; 
+    struct snake* snake;
+    int foodx[FOOD_COUNT];
+    int foody[FOOD_COUNT];
+};
 
-struct snake* remove_snake(struct snake* snake) {
-    if (snake == NULL || snake->next == NULL) {
-        return NULL;
-    }
-    struct snake* temp = snake;
-    while(temp->next->next != NULL) {
-        temp = temp->next;
-    }
-    free(temp->next);
-    temp->next = NULL;
-    return snake;
-}
 
-int is_snake(struct snake* snake, int x, int y) {
-    while(snake != NULL) {
-        if(snake->x == x && snake->y == y) {
-            return 1;
-        }
-        snake = snake->next;
-    }
+void initialize(struct state* state);
+void render(struct state* state);
+void handle_input(struct state* state);
+void game_loop(struct state* state);
+void cleanup(struct state* state);
+
+int main() {
+    struct state game_state;
+    initialize(&game_state);
+    game_loop(&game_state);
+    cleanup(&game_state);
     return 0;
 }
 
-void free_snake(struct snake* snake) {
-    struct snake* temp;
-    while(snake != NULL) {
-        temp = snake;
-        snake = snake->next;
-        free(temp);
+void initialize(struct state* state) {
+    state->width = WIDTH;
+    state->height = HEIGHT;
+    state->sx = 1; 
+    state->sy = 0;
+    state->snake = add_snake(NULL, 5, 5); 
+    
+    for (int i = 0; i < FOOD_COUNT; i++) {
+        state->foodx[i] = rand() % state->width;
+        state->foody[i] = rand() % state->height;
     }
 }
 
-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, 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);
-            for(int j = 0; j < FOOD_COUNT; j++) {
-                if(state->foodx[j] != -1) {
-                    return END_CONTINUE;
+void render(struct state* state) {
+    system("cls"); 
+    
+    for (int y = 0; y < state->height; y++) {
+        for (int x = 0; x < state->width; x++) {
+            if (is_snake(state->snake, x, y)) {
+                printf("* "); 
+            } else {
+                int food = 0;
+                for (int i = 0; i < FOOD_COUNT; i++) {
+                    if (state->foodx[i] == x && state->foody[i] == y) {
+                        printf("o "); 
+                        food = 1;
+                        break;
+                    }
                 }
+                if (!food) printf(". "); 
             }
-            return END_FOOD;
+        }
+        printf("\n");
+    }
+}
+
+void handle_input(struct state* state) {
+    if (_kbhit()) { 
+        char key = _getch(); 
+        switch (key) {
+            case 'w':
+                state->sx = 0; state->sy = -1; 
+                break;
+            case 's':
+                state->sx = 0; state->sy = 1; 
+                break;
+            case 'a':
+                state->sx = -1; state->sy = 0; 
+                break;
+            case 'd':
+                state->sx = 1; state->sy = 0; 
+                break;
+            case 'q':
+                exit(0); 
+                break;
+            default:
+                break;
         }
     }
-
-    state->snake = add_snake(state->snake, new_x, new_y);
-    state->snake = remove_snake(state->snake);
-
-    return END_CONTINUE;
+}
+
+void game_loop(struct state* state) {
+    while (1) {
+        render(state);
+        handle_input(state);
+        int result = step_state(state);
+        if (result == END_WALL || result == END_SNAKE) {
+            printf("Game Over!\n");
+            break;
+        } else if (result == END_FOOD) {
+            printf("You ate all the food! You win!\n");
+            break;
+        }
+        
+    }
+}
+
+void cleanup(struct state* state) {
+    free_snake(state->snake);
 }