String Questions

Forum 2005-2010 (read only) Software Syntax & Programs
1

So I am looking for some help or a point in the right direction to find out who to create strings on the fly. Looking to have Arduino go though some random array of text and put three or four words together into one string and then print out to a LED Matrix. So I cant seem to find much help on how to simply add "Woof" + "Bear" together into one string var?

Thanks in advance!

2

This works for me, not sure if this is what you'll need though.

char woof[5] = "Woof";
char bear[5] = "Bear";
char buffer[30];
int pos;

void setup()
{
  Serial.begin(9600);
}

char* addStrings(char *s, char *s2)
{
  while(*s)
  {
    buffer[pos++]=*s++;
  }
  while(*s2)
  {
    buffer[pos++]=*s2++;
  }
  pos=0;
  return buffer;
}

void loop()
{
  Serial.println(addStrings(woof,bear));
  delay(2000);
  Serial.println(addStrings("hello ","world!"));
  delay(2000);
}
3

So I am looking for some help or a point in the right direction to find out who to create strings on the fly. Looking to have Arduino go though some random array of text and put three or four words together into one string and then print out to a LED Matrix. So I cant seem to find much help on how to simply add "Woof" + "Bear" together into one string var?

Thanks in advance!

Hi,

I am new with the Arduino, but I have been playing a little with stepper motor control. In doing that I found the need for a string library. So I created one that emulates C++ std::string. Currently there are 2 arduino libraries needed for this (add them under hardware/libraries)
http://www.arnholm.org/arduino/ard_string.zip
http://www.arnholm.org/arduino/ard_new_delete.zip

With these, you can append one string to another etc. :slight_smile: