save project

diy2.py

@@ -6,8 +6,10 @@ while True:
     if name==username and password==userpassword:
     print("登入成功")    
         break
-    else:
-        print("登入失败,请重新输入")
+    if name!=username:
+        print("用户名输入错误，请输入用户名")
+    if password!=userpassword:
+        print("密码输入错误，请输入密码")
 print("欢迎加入贝尔编程")