整数计算器（电脑显示结果）
..........................\LED.c
..........................\LED.h
..........................\STARTUP.A51
..........................\STARTUP.LST
..........................\STARTUP.OBJ
..........................\keyscanf.LST
..........................\keyscanf.OBJ
..........................\keyscanf.c
..........................\keyscanf.h
..........................\计算器
..........................\计算器.LST
..........................\计算器.M51
..........................\计算器.OBJ
..........................\计算器.c
..........................\计算器.hex
..........................\计算器.lnp
..........................\计算器.plg
..........................\计算器.uvopt
..........................\计算器.uvproj
..........................\计算器_uvopt.bak
..........................\计算器_uvproj.bak
..........................\键盘扫描识别
..........................\键盘扫描识别.LST
..........................\键盘扫描识别.OBJ