C - IF(char[] == "ZYX") 不起作用 [英] C - IF(char[] == "ZYX") don't work

问题描述

我从 arduino 发送到 arduino 字符串 (I2C)，捕获并保存到 char[10].当我将此变量与文本进行比较时，条件没有执行 :-/而且我不知道为什么...

I send from arduino to arduino string (I2C), catch and save to char[10]. When I compare this variable to text, condition don't have execute :-/ And I don't know why...

char dataRx[10] = "";

void DaemonReceiving(int howMany){
  int index = 0;

  while(Wire.available() > 0){
    char c = Wire.read();

    dataRx[index++] = c;
    dataRx[index] = '\0';
  }
  Serial.println(dataRx);

  if(dataRx == "HELLO"){
        Wire.beginTransmission(1);
        Wire.write("HI");
        Wire.endTransmission();
  }
}

推荐答案

要将 dataRX 字符串与HELLO"进行比较，请使用:

To compare the dataRX string to "HELLO", use:

if (strcmp (dataRx,"HELLO") == 0) {

    // matches HELLO

}

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