char array to int arduino
atoi(foo)arduino char array
char array[12]="asdfgh"; //the max. string length is 11 characters
// and Null as string-terminator
void setup() {
Serial.begin(9600);
//String manipulations
Serial.println(array); //-> asdfgh
Serial.println(array[2]); //-> d
Serial.println(array+2); //-> dfgh
//but following generate compiler error
//array+=2; //incompatible types in assignment of 'int' to 'char [10]'
strcpy(array,"hallo");
Serial.println(array); //-> hallo
strcpy(array,"");
Serial.println(array); //->
strcpy(array,"23456789");
Serial.println(array); //-> 23456789
strncpy(array,"hallo",2); //!!!see 2 lines later
Serial.println(array); //-> ha456789
array[2] = '\0'; //terminator neccessary
Serial.println(array); //-> ha
strcat(array,"567");
Serial.println(array); //-> ha567
strncat(array,array,3);
Serial.println(array); //-> ha567ha5
strcpy(array,array+3);
Serial.println(array); //-> 67ha5
//add bytewise inputs to char array
Serial.println("");
Serial.println("Bytewise add:");
byte InputChar='a';
uint8_t InputInt=108; //108 ist the char 'l'
int i;
strcpy(array,"test");
Serial.println(array); //-> test
i=strlen(array);
array[i++]=InputChar; // put InputChar at location i & increment i
array[i]='\0'; // allways terminate strings
Serial.println(array); //-> testa
array[i++]=InputInt; //this overwrites last written terminator
array[i]='\0'; //new string terminator
Serial.println(array); //-> testal
}
void loop() {}Copyright © 2021 Codeinu
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