save project

diy1.py

@@ -7,5 +7,9 @@ while True:
     if a==username and b==userpassword :
         break
     print("登陆失败，请重新输入！")
+    if a!=username:
+        print("用户名输入错误，请重新输入")
+    if b!=userpassword:
+        print("密码输入错误，请重新输入")
 print("登陆成功！")
 print("欢迎来到贝尔编程")
\ No newline at end of file