clock.c是实现闹钟功能，先输入个时间，程序不能关闭，到了那个时间就会发生，歌曲可自己更改，但是名字要与原来相同，或自己改代码里的歌曲名，clockanhour.c则是从打开程序开始每隔1小时报时一次-clock.c realize alarm clock function, enter a time, the program can not be closed, to the time that happens, the songs themselves can change, but t