Help with converting a int into a Ascii group of numbers.

Using Arduino Programming Questions
#1

I need help. I am having trouble converting an int into a char string. Is there a special command for this? Thanks,

#2

sprintf is one way.

#3

I have not found out how to use sprintf and I don't know where the library for it is. Help!

#4

I find Google handy in such situations, and I don't mean that sarcastically.

Anyway I found this:

http://playground.arduino.cc/Main/Printf

#5

Here’s a start:

  int aInt = 2468;        // Test number
  char asciiGroupOfNumbers[7];    // Max -32768, which is 6 chars + null
  int tensComponent;
  byte digitCounter;

  digitCounter = 0;
  if (aInt < 0)
  {
    asciiGroupOfNumbers[0] = '-';
    aInt = -aInt;
    ++digitCounter;
  }

  for (tensComponent = 10000; tensComponent; tensComponent /= 10)
  {
    asciiGroupOfNumbers[digitCounter++] = aInt / tensComponent + '0';
    aInt %= tensComponent;
  }
  asciiGroupOfNumbers[digitCounter] = 0;    // Add the null terminator

You might want to deal with leading 0 suppression, and maybe deal with the -32768, but other than that I think it works.

#6

luketheduke: I need help. I am having trouble converting an int into a char string. Is there a special command for this? Thanks,

You don't show the code context in which you are working, such as c-strings or Strings. In the past somebody posted the below as examples that might be of use.

//convert a integer into a string

val6 = year();
String s1 = String(val6);


int number;
char msg[20];
sprintf(msg,"%d",number);
#7