c# - 此行如何使我的控制台应用程序发出蜂鸣声？

Question

偶然发现了这个。有人可以解释为什么这会发出哔哔声吗？

while (true)
{
      Console.WriteLine(Encoding.Default.GetString(BitConverter.GetBytes(7)));
}

Answer 1

因为那是 Bell code .

A bell code (sometimes bell character) is a device control code originally sent to ring a small electromechanical bell on tickers and other teleprinters and teletypewriters to alert operators at the other end of the line, often of an incoming message.

让某些设备在接收到消息的某些部分(例如开始或结束)时发出声音是一种古老的技巧。您的计算机恰好是打印该字符时发出噪音的设备之一。