keil编程时，它提示 A.C(9): error C202: 'Power': undefined identifier;A.C(10): error C202: 'lcden': u

keil编程时，它提示 A.C(9): error C202: 'Power': undefined identifier;A.C(10): error C202: 'lcden': undefined identifier;求高手指教 下面是一段源程序：
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
//***************************************************************
//***************************************************************
void init()
{
power=0; //power is ok
lcden=0; //low enble
write_com(0x38);
write_com(0x0c); //display open ,cursor off,blink off
write_com(0x06); //pointer auto add 1
write_com(0x01); //clear screen and pointer
write_com(0x80);
TMOD=0x10; //time1,16 bit timmer
EA=0; //open entire interrupt
Trig=0;
Echo=0;
delay(1);
}
//***************************************************************