When an error occurs in a system call, you can access and display a message corresponding to the error in at least one of two ways: by using either the perror or the strerror function.
当系统调用中出现错误时，您至少可以用以下两种方式的一种来访问和显示与该错误对应的消息：通过使用perror或strerror函数。
The error page can then display a friendly error message to the user, and then perhaps log the relevant exception information for the system administrator to review at a later time.
错误页面可以显示一个友好的信息给用户，然后可以将相关的异常信息写入日志以供管理员日后查看。
The first line will pop up a message on the control nodes' display (if X Window System is active), letting the user know that the laptop is inactive and needs to be powered down.
第一行将在控制节点的界面上弹出消息（如果XWindowSystem 处于活动状态），从而让用户知道笔记本处于非活动状态并且需要关闭。
Front page (that is, the book library management system home page) to achieve a bulletin display Book Search, a message the proposed three functions.
前台页面（即本书图书管理系统的首页）实现了公告的显示图书查询，留言建议三大功能。
Features 1, Microcomputer control system, high stability, and with self-monitoring function, can display an error message, easy to maintain.
主要特点1、微电脑控制系统，稳定性高，且具备自我监测功能，可显示错误讯息，易于维修。
0x0001 the system does not display the critical-error-handler message box. Instead, the system sends the error to the calling process.
系统不显示错误对话框，相反，系统返回错误代码给主调进程。
0x0001 the system does not display the critical-error-handler message box. Instead, the system sends the error to the calling process.
系统不显示错误对话框，相反，系统返回错误代码给主调进程。
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