一个最小的钢琴软件,可用键盘弹奏，按键顺序就是“abcd”这样的顺序-A minimal piano software, available keyboard playing, the key sequence is the order of " abcd"

用易语言写的一个能弹钢琴的小程序，还能自己加谱，让电脑弹-With easy language to write a small program to play the piano, but also add their own spectrum, computer shells