How to split a string into substring Arduino

Question

I'm about identify myself stupid, howcome I couldn' t figure out how to split a string into substring using arduino, even after 10 days of searching. The number is fact... So, As Mr.Arduino.cc says: string.substring() is just can be used as conditional phrase with loops like if. and there is no method such strtok() like in C can help me with this. So guys, I' m bagging you for help, please!

if (ks > 255 * 60)
 {
 vek.print("Bu yazı, ", 25, 0);
 vek.printNumI(255*60, 25, 8);
 vek.print("karakterd-", 25, 16);
 vek.print("en uzun ol", 25, 24);
 vek.print("dugundan", 25, 32);
 vek.print("gosterlemz", 25, 40);
 }
for (byte i = 0; i <= ss ; i ++)
 {
 for (byte j = 0; j <= 6; j++)
 {
 int ilk_kar = j * 10 + i * 60;
 int son_kar = ilk_kar + 10;
 String yaz=readString.strtok(ilk_kar,son_kar);
 vek.print(yaz, 25, j);
 if (analogRead(A5) == 1023)
 {
 continue;
 }
 else
 {
 break;
 }
 }
 }
 }
}

Error: sketch_aug22a.ino: In function ‘void loop()’: sketch_aug22a.ino:83:56: error: ‘class String’ has no member named ‘strtok’

What am I supposed to do?

Thanks, already...

• st2000: Do you want to split the string on a particular character or position?
• Edgar Bonet: You can use strtok(). It's not part of the Arduino core library: it's just a libc function.
• Konko: And, how am I supposed to find that libc (I guess a library) thing?
• Konko: Mr.Bonet, pls, I need this answer...
• Nick Gammon: It would help to have the above questions answered. Do you want to split at a certain spot (eg. 5th character)? Or after certain symbols (eg. a comma)?

Answer 1

Import the string.h library by adding #include <string.h> on top of your sketch, in order to use the strtok() function. Checkout the usage example of strtok() here: http://www.cplusplus.com/reference/cstring/strtok/?kw=strtok

• Konko: in arduino ide?
• Dmitri: Yes, of course.