save project

diy1.py

@@ -7,4 +7,8 @@ while True:
     if name==username and password==userpassword:
         print("登录成功")
         break
+    if  name != username:
+        print("用户不存在")
+    if  name != userpassword:
+        print("密码不正确")        
 # 如果用户输入的账号、密码正确，提示登陆成功
\ No newline at end of file