save project

diy4.py

@@ -6,5 +6,8 @@ while True:
     if name == username and password == userpassword:
     if name == username and password == userpassword:
         print("登陆成功！")
         print("登陆成功！")
         break
         break
-    print("用户名和密码错误，请重新输入")
+    if name != username:
+        print("用户名不存在，请重新输入")
+    if password != userpassword:
+        print("密码输入错误，请重新输入")
 print("欢迎来到贝尔编程！")
 print("欢迎来到贝尔编程！")
\ No newline at end of file