warning C275: expression with possibly no effect單片機程序編譯錯誤

ID:571461 · 發表于 2019-6-26 10:30

#include <reg52.h>
#define uchar unsigned char
#define uint  unsigned int
sbit wei=P2^4;
sbit wei1=P2^5;
sbit beep=P2^0;
sbit sensor=P0^7;
sbit sensor1=P0^6;
uchar flag1;
uchar flag;
void chuankou(uchar temp)
{
uchar table1[]={1,2};
uchar m;
PCON=0x00;
SCON=0x50;
TMOD=0x20;
TH1=0xE6;
TL1=0xE6;
TR1=1;
for(m=0;m<2;m++)
{
   SBUF=table1[temp];
      while(TI==0);
      TI=0;
}
}
void delay(uint t)
{
while(t--);
}
void Test_Voltage(void)
{
if(sensor==0&sensor1==1)
{
   delay(10000);
         if(sensor == 0)
         {
            flag1 = 1;

         }
else
         {
         flag1 == 0;
         }
}
else
         {
         flag1 == 0;
         }
         }
void action(void)
{
   if(flag1 == 1)
      {
         wei=0xfe;
            P0 = 0x25;
            beep = 0;
            chuankou(1);
            delay(10000);
            beep = 1;
            delay(10000);
            wei=0xfd;

      }
      else
      {
         wei=0;
            P0 = 0x03;
      }
}
void Test_Voltage1(void)
{
if(sensor1==0&sensor==1)
      {
         delay(10000);
         if(sensor1==0)
         {
            flag = 1;

         }
      else
         {
         flag = 0;
         }

      }
      else
         {
         flag = 0;
         }
}
void action1(void)
{
   if(flag == 1)
      {
         wei=0xfe;
            P0 = 0x9f;
            beep = 0;
            chuankou(0);
            delay(10000);
            beep = 1;
            delay(10000);
            wei=0xfd;

      }
      else
      {
         wei=0;
            P0 = 0x03;
      }
}
void main(void)
{
while(1)
{
   Test_Voltage();
      action();
      Test_Voltage1();
      action1();

}
}
紅外感應.C(44): warning C275: expression with possibly no effect

ID:828092 · 發表于 2021-4-9 21:46

倆flag1后面多打了一個等號

帳號		自動登錄	找回密碼
密碼			立即注冊

久久久久久久999_99精品久久精品一区二区爱城_成人欧美一区二区三区在线播放_国产精品日本一区二区不卡视频_国产午夜视频_欧美精品在线观看免费

warning C275: expression with possibly no effect單片機程序編譯錯誤