save project

diy1.py

@@ -7,10 +7,9 @@ while True:
     if a==username and q==userpassword :
         print("登录成功")
         break  
-    if a != username: 
+    elif a != username: 
         print("用户名不存在，请重新输入")
-        continue
-    if q != userpassword:
+    else:
         print("密码输入有误，请重新输入")
         continue  
 print("欢迎来到贝尔编程!")