想实现0-59循环的单片机秒表，以下主程序该怎么改呢？

正文摘要:

#include<reg52.h> #include <intrins.h> typedef unsigned int a1; typedef unsigned char b2; unsigned char code DuanMa[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; unsigned char Dis_d ...