说明： 用C语言编写的钢琴，可以自己演奏，也可以播放自己编写的音乐文件。后者是自己编写歌曲文件，应用程序通过读取该文件，能播放音乐。是一种简单的音乐播放器的模型。 (C language of the piano, their performances can also be prepared by the broadcast their music files. The latter song is its own document preparation, application procedures by reading the document, can play music. It is a simple music player models.)
