Use LED digital display counter plan of tube T0 numerical, including 51 SCM registers definition of header files.
用LED数码管显示计数器t0的计数值，包含51单片机寄存器定义的头文件。
2
SCM experiment C source code external interruption, two experiments: 1, outside interrupt count two digital tube display 2 and external interruption counter.
说明：51单片机外中断实验C源码，两个实验：1、外中断计数2位数码管显示；2、外中断计数器。
3
The counter flow design efficiently cools the tube side liquid.