51单片机00.00~99.99秒表,K1开始和暂停,K2清零答:/***proteus仿真中晶振电路及复位电路自行添加*晶振:12M***/#include <reg51.h> sbit K1=P2^0;//sbit K2=P2^1;//bit flag=0; //int num; int L[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//数码管段选数据 根据实际电路修改 int wei[8]={0xfe,0xfd,0xf...