save project

diy1.py

@@ -7,5 +7,8 @@ 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
-
+    elif name != username:
+        print("用户名不存在,重新输入!")
+    else:    
+        print("密码有误,重新输入!")  
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")