save project

diy1.py

@@ -7,6 +7,10 @@ while True:
     password= input("123456")
     if name == username and password == userpassword:
         break
+    if name != username:
+        print("账号不存在")
+    if password != userpassword:
+        print("密码错误")
     input("登录错误")
 input("登录成功")