請問'tab':undefined identifier是怎麼回事啊?
源程式程式碼如下:
include <reg51.h>
#include <string.h>
void main()
{
unsigned char tab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f} ;//段碼錶
void display(unsigned char i);
void Delay(unsigned char i);
IE=0x81;
SCON=0x00;
TCON=0x00;
TMOD=0x10;
while(1)
{
P0=0x9e;
P1=0xf7; //東西亮紅燈,南北亮綠燈
display(55);
P0=0xae;
P1=0xfb; //東西亮紅燈,南北亮黃燈
display(5);
P0=0xf3;
P1=0xfc; //東西亮綠燈,南北亮紅燈
display(55);
P0=0x75;
P1=0xfd; //東西亮黃燈,南北亮紅燈
display(5);
}
}
void inter0(void) interrupt 0
{
P0=0xb6;
P1=0xfd; //東西、南北均亮紅燈
display(30);
}
void display(unsigned char i)
{
while(i!=0)
{
unsigned char j,k;
j=i%10;
SBUF=tab[j];
while(TI!=1);
TI=0;
k=i/10;
SBUF=tab[k];
while(TI!=1);
TI=0;
Delay(20);
i--;
}
}
void Delay(unsigned char i)
{
TR1=1;
while(i!=0)
{
TH1=0x9e;
TL1=0x58;
while(TF1!=1);
TF1=0;
i--;
}
TR1=0;
}
編譯後出現了錯誤:'tab':undefined identifier,請問是怎麼回事啊?本人才學習C語言,很多不懂,麻煩高手賜教,謝謝!