save project

diy2.py

@@ -6,5 +6,9 @@ userpassword = "123456"
     if name == username and password == userpassword:
     if name == username and password == userpassword:
         print("登录成功!")
         print("登录成功!")
         break
         break
+        if name!=username:
+          print("用户名不存在，请重新输入")
+        if password!=userpassword:
+            print("密码不正确，请重新输入")
         print("用户名或密码错误，请重新输入")
         print("用户名或密码错误，请重新输入")
 print("欢迎来到贝尔编程")
 print("欢迎来到贝尔编程")
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