save project

diy1.py

@@ -6,7 +6,11 @@ while True:
     if name == username and password == userpassword:
        print("登录成功")
        break
-    print("登录失败！请重新输入")    
+    if name != username:
+        print("用户不存在,请重新输入")
+        continue
+    if password != userpassword:
+        print("密码输入错误,请重新输入")
 print("欢迎来到贝尔编程")