这是一个用C语言编写的关于GBA的程序，原创者应该是azhong。本源程序是演示一个比较不错的BG且使用方向键可以将其上下左右移动。-This is a C language program on the GBA, originality should be azhong. The source code is to demonstrate a relatively good BG and use the arrow keys you can move it up and down.