此程序是微机与接口技术的课程设计源程序 ，闰年计算，代码转换，BCD码相乘，写文件，打字计时练习，计算N的阶乘，打印接口，音乐演奏-This procedure are computer technology and interface design curriculum source, a leap year, the code conversion, BCD Code multiplied, writing paper, typing practice time to calculate