这是程序。。。求指导
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
uchar code table[]="aaaa";
uchar code table1[]="bbbb";
sbit lcden=P3^4;
sbit lcdrs=P3^5;
sbit dula=P2^6;
sbit wela=P2^7;
uchar num;
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
  for(y=110;y>0;y--);
}
void write_com(uchar com)
{
lcdrs=0;
P0=com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}

void write_data(uchar date)
{
lcdrs=1;
P0=date;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void init()
{
dula=0;
wela=0;
lcden=0;
write_com(0x38);
write_com(0x0e);
write_com(0x06);
write_com(0x01);
  write_com(0x82);
}
void main()
{
   init();
    for(num=0;num<4;num++)
     {
  write_data(table[num]);
  delay(200);
  }
  write_com(0x80+0x45);
  for(num=0;num<4;num++)
         {
  write_data(table1[num]);
  delay(200);
          }
  )
   while(1) ;
}