save project

diy1.py

@@ -6,5 +6,8 @@ while True:
     if yourname==username and yourpassword==userpassword:
         print("登录成功")
         break
-    print("用户名或账号密码输入错误")
+    if yourname!=username:
+        print("用户名不存在，请重新输入！")
+    if yourpassword!=userpassword:
+        print("用户密码不存在，请重新输入！")
 print("欢迎来到贝尔编程！")
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