save project

snake.py

@@ -6,8 +6,6 @@ down = pygame.image.load('down.png')
 x=240
 y=120
 position = [(180,90),(180,120),(210,120),(x,y)]
-setheading="right"
-snake_head=right
 # 初始化pygame，为使用硬件做准备
 pygame.init()
 
@@ -19,6 +17,8 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+setheading="right"
+snake_head=right
 
 while True:
     for event in pygame.event.get():
@@ -38,7 +38,14 @@ while True:
             if event.key == locals.K_down and setheading != "up":
                 setheading="down"
                 snake_head=down 
-    x += 30
+        if setheading=="right":
+            x+=30 
+        elif setheading=="left":
+            x-=30  
+        elif setheading=="up":
+            y+=30         
+        else:
+            y+=30  
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去