save project

diy1.py

@@ -7,6 +7,10 @@ while True:
     if name==username and password==userpassword:
         print("登陆成功")
         break    
+    if name != username:
+        print("用户名不存在,请重新输入")
+    if password != userpassword:
+        print("密码不存在,请重新输入")
     else:
         print("登陆失败")
 print("欢迎来到贝尔编程")