求 温度报警 程序？？

#include<reg51.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar code table[10]  = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};  //表
uchar code table2[10] = {0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10};  //带DP点
uchar code weiM[4]    = {0xf7,0xfb,0xfd,0xfe};
uchar data duanM[4]   = {0x00,0x00,0x00,0x00};
sbit   DQ  = P3^4;              //数据口
sbit  P12  = P1^2;    //时间、日期、温度显示转换
sbit  P14  = P1^4;    //显示暂停
sbit  P11  = P1^1;    //选择想要改变的数码管的位选
sbit  P13  = P1^3;    //码值加1
void delay(uchar i)
{
while(--i);
}
void delay2(uint i)
{
   while(--i);
}
void Init_Ds18b20(void)    
{
DQ = 1;                   
delay(1);                
DQ = 0;              
delay(250);              
DQ = 1;                  
delay(100);               
}

uchar Read_One_Byte()      
                          
{
uchar i   = 0;
uchar dat = 0;
for(i=8;i>0;i--)
{
   DQ = 0;                 
                         
   _nop_();               
   dat >>= 1;            
   DQ = 1;                 
   delay(1);               
   if(DQ)                  
   {
    dat |= 0x80;           
   }       
   delay(10);             
}
return (dat);
}

void Write_One_Byte(uchar dat)
{
uchar i = 0;
for(i=8;i>0;i--)
   {
       DQ = 0;                      
       _nop_();                      
       DQ = dat&0x01;             
                               
                            
        delay(10);                   
       DQ = 1;                       
       dat >>= 1;
        delay(1);
   }
}

   for(i=0;i<4;i++)
  {
     if(i==2)
  {
      P2 = 0xff;
   P0 = 0xff;
       P0 = table2[duanM];
      P2 = weiM;
      delay2(250);  
  }
  else
  {
      P2 = 0xff;
   P0 = 0xff;
       P0 = table[duanM];
      P2 = weiM;
      delay2(250);
  }
  }
}
void main(void)
{
   uint tt;
   while(1) 
  {
   tt=Get_Tmp();
   TDisp(tt);
  }      
}