51单片机,8位共阴极数码管动态显示12位学号,按键调整走动速度,C语言的...答:include <intrins.h> sbit k_add = P3^1;sbit k_sub = P3^4;unsigned char code SEG7[] = { 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90, 0xff};unsigned char DISP_BUFF[] = { 10, 10, 10, 10, 10, 10, 10, 10,1, 3, 9, 2, 5, 8, 0, 7, 4, ...