各位前輩，程序報錯如下，是哪里出問題了？
linking...
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: ?C_START
MODULE: .\Objects\STARTUP.obj (?C_STARTUP)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL: ?C_START
MODULE: .\Objects\STARTUP.obj (?C_STARTUP)
ADDRESS: 080AH
Program Size: data=9.0 xdata=0 code=15
creating hex file from ".\Objects\PAN"...
".\Objects\PAN" - 0 Error(s), 2 Warning(s).
Build Time Elapsed: 00:00:01
按下述寫入報錯誤了
#include <reg52.h>
bit LED = P0^0;
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;
void main()
{
unsigned char cnt = 0;
ENLED = 0;
ADDR3 = 1;
ADDR2 = 1;
ADDR1 = 1;
ADDR0 = 0;
TMOD = 0x01;
TH0 = 0xB8;
TL0 = 0x00;
TR0 = 1;
while (1)
{
if (TF0 == 1)
{
TF0 = 0;
TH0 = 0xB8;
TL0 = 0x00;
cnt++;
if (cnt >=50)
{
cnt = 0;
LED = ~LED;
}
}
}
}
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