以下是今日练习通过逗号来分割字符数组/字符串的2个例子和方法“

1.通过indexOf函数

/**Splitsplit sketch*split a comma-separated string*/String message = "Peter,Paul,Mary";int commaPosition;void setup(){  Serial.begin(9600);}void loop(){   Serial.println(message);   do{      commaPosition = message.indexOf(',');      if(commaPosition != -1)      {         Serial.println(message.substring(0,commaPosition));         message=message.substring(commaPosition+1,message.length());        //  Serial.println(message);      }      else{        if(message.length()>0){           Serial.println(message);        }      }   }   while(commaPosition>=0);  // if(message=="Mary")  // while(1);   delay(5000);}

 

2.通过strtok_r函数

/***SplitSplit sketch*split a commaPosition string**/const int MAX_STRING_LEN = 20;char stringList[] = "Peter,Paul,Mary";char stringBuffer[MAX_STRING_LEN+1];void setup(){  Serial.begin(9600);}void loop(){  char *str;  char *p;  strncpy(stringBuffer,stringList,MAX_STRING_LEN);  Serial.println(stringBuffer);  for(str=strtok_r(stringBuffer,",",&p); //split using comma     str;   //loop while str is not null     str = strtok_r(NULL,",",&p) //get subsequent tokens     ){     Serial.println(str);     if(strcmp(str,"Paul")==0)        Serial.println("found Paul");      }     delay(5000);}/* strtok_r()str=strtok_r(stringBuffer,",",&p) //把stringBuffer按逗号拆分，//拆分后数值首地址付给指针p,数值赋值给指针str*/提取逗号中数值：/**SplitSplit sketch*Split a comma-separted string*/const int MAX_STRING_LEN =20;char stringList[] = "H,10,1050,15000,/r/n";char stringBuffer[MAX_STRING_LEN + 1];void setup(){  Serial.begin(9600);}void loop(){  char *str;  char *p;  char index = 0;  strncpy(stringBuffer,stringList,MAX_STRING_LEN);  Serial.println(stringBuffer);  for(str=strtok_r(stringBuffer,",",&p);     str;     str=strtok_r(NULL,",",&p)     )   {     index ++;     Serial.println(str);     if(strcmp(str,"H")==0)        Serial.println("found HEADER");               Serial.println();               if(strlen(str)==2){  //if not 2 digital,it is easy to error          Serial.print("value1 = " );          Serial.println(str);}                if(index==3){          Serial.print("value2 = " );          Serial.println(str);}                   if(index==4){          Serial.print("value3 = " );          Serial.println(str);}                  }       delay(50000);}