save project

diy2.py

@@ -6,12 +6,10 @@ while True:
     if name == username and password == userpassword:        
         print("登录成功!")
         break
-    if name != username:
+    elif name != username:
         print('用户名错误，请重新输入')       
-        continue
-    if password !=userpassword:
+    else:
         print('密码错误，请重新输入')     
-    print("用户名和密码错误!请重新输入")
 print("欢迎来到贝尔编程!")