#include<reg52.h>
#define uchar   unsigned char
#define uint      unsigned int
uchar  C_cross[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
uchar    R_cross[10][8]={
          {0x00,0x42,0x46,0x4a,0x52,0x62,0x42,0x00},//"Z"
          {0x00,0x40,0x40,0x7e,0x40,0x40,0x00,0x00},//"T"
          {0x7e,0x20,0x10,0x08,0x10,0x20,0x7e,0x00},//"M"
          {0x00,0x42,0x42,0x7e,0x42,0x42,0x00,0x00},//"I"
          {0x30,0x48,0x44,0x32,0x44,0x48,0x30,0x00},//"LOVE"
          {0x00,0x80,0x40,0x3e,0x40,0x80,0x00,0x00}, //"Y"
          {0x30,0x28,0x14,0x38,0x38,0x14,0x28,0x30},//"LOVE,LOVE"
          {0x00,0x80,0x40,0x3e,0x40,0x80,0x00,0x00}, //"Y"
          {0x00,0x20,0x20,0x1e,0x10,0x20,0x20,0x00}, //"R"
          {0x00,0x7e,0x42,0x42,0x42,0x24,0x18,0x00}  //"D"
     };
uchar offset;
uchar n;
void Delayms(uchar mt)
{
uchar t;
for(mt;mt>0;mt--)
  for(t=110;t>0;t--);
}
void main(void)
{
uchar i;
uchar *p;
n=0;
TMOD=0x01;
TH0=0xfc;
TL0=0x18;
ET0=1;
EA=1;
TR0=1;
p=&R_cross[0][0];
while(1)
{
    for(i=0;i<8;i++)
    {
  Delayms(10000);
     P0=*(p+offset);        //这里如果换成a[][]的形式是什么？


P2=C_cross[i];
   p++;
   if(p>&R_cross[0][7])
         p=&R_cross[0][0];
}         
  }
}
void timer0() interrupt 1 using 3
{
  TF0=0;
TH0=0xfc;
TL0=0xe18;
if(n<200)
{
    n++;
}
else
{
     n=0;
  offset+=1;
  if(offset>72)
  offset=0;
}
  P0=*(p+offset);        //这里如果换成a[][]的形式是什么？
求给出详细注释