save project

snake.py

@@ -19,19 +19,14 @@ body = pygame.image.load('body.png')
 setheading="right"
 a=right
 while True:
-    if setheading=='right':
-        x+=30
-        a=right
-    elif setheading=='left':
-        x-=30
-        a=right
-    elif setheading=='up':
-        y+=30
-        a=up
-    elif setheading=='down':
-        y-=30
-        a=down
-        
+    if setheading=="right":
+        x=x+30
+    elif  setheading=='left':
+        x=x-30
+    elif setheading=='down': 
+        y=y+30      
+    else :
+        y=y-30
     
     sb.append((x,y))
     sb.pop(0)
@@ -39,15 +34,15 @@ while True:
         if event.type == locals.QUIT:
             exit()
         if event.type==locals.KEYDOWN:
-            if event.key==locals.K_RIGHT and setheading !='left':
-                setheading='right'
             if event.key==locals.K_LEFT and setheading !='right':
                 setheading='left'
+            if event.key==locals.K_RIGHT and setheading !='left':
+                setheading='right'
             if event.key==locals.K_UP and setheading !='down':
                 setheading='up'
             if event.key==locals.K_DOWN and setheading !='up':
                 setheading='down'
-
+            
 
             # 接收到退出事件后退出程序