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void Dal_TX(unsigned char Q)
 
{
 
	unsigned char Buf_X[4];
 
	unsigned int i;
 
	RI=0;//²M°£±µ¦¬
 
	Buf_X[0]=(Q/1000)+0x30;              //千位
 
	Buf_X[1]=(Q%1000)/100+0x30;          //百位
 
	Buf_X[2]=((Q%1000)%100)/10+0x30;     //十位
 
	Buf_X[3]=((Q%1000)%100)%10+0x30;     //個位
 
 
 
	for(i=0;i<4;i++)
 
	{
 
		SBUF=Buf_X[i];
 
		while(TI==0);
 
		TI=0;
 
	}
 
}

prog.c: In function 'Dal_TX':
prog.c:9:2: error: 'RI' undeclared (first use in this function)
  RI=0;//²M°£±µ¦¬
  ^
prog.c:9:2: note: each undeclared identifier is reported only once for each function it appears in
prog.c:25:3: error: 'SBUF' undeclared (first use in this function)
   SBUF=Buf_X[i];
   ^
prog.c:27:9: error: 'TI' undeclared (first use in this function)
   while(TI==0);
         ^

Standard output is empty