save project

snake.py

@@ -56,12 +56,16 @@ while True:
         y += 30
     position.append((x, y))
     if x == apple_x and y == apple_y:
-        num1 = random.randint(0,660)
-        num2 = random.randint(0,480)
+        num1 = random.randint(1,22)
+        num2 = random.randint(1,16)
         apple_x = 30*num1-30
         apple_y = 30*num2-30
+        score=score+10
     else:
         position.pop(0)
+
+    if x < 0 or x > 630 or y < 0 or y > 450:
+        exit()
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -78,4 +82,4 @@ while True:
     # 将果实画上去
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
\ No newline at end of file
+    FPSCLOCK.tick(3.14)
\ No newline at end of file