jbode

 Profile Answers by jbode Questions by jbode

• Sep 19th, 2011

 

Use sprintf.

ALternately, you could do something like this (probably not the most efficient approach, but fairly straightforward:

Code
#define MAXDIGITS ... // maximum number of digits that an int type can represent. 


                      // Will vary by implementation (16-bit vs. 32-bit vs. 64-bit)


 


/**


 * Precondition: target points to a writable buffer large enough to hold the result


 */


void intToStr(int val, char *target)


{


  char digit[10] = {'0', '1', '2', '3', '4', 


                    '5', '6', '7', '8', '9'};


  char stack[MAXDIGITS] = {0};  


  size_t sp = MAXDIGITS;


  size_t i = 0;


  int sign = val < 0;


  


  if (sign)


    val = -val;


        


  while (val)


  {


        stack[--sp] = digit[val%10];


        val /= 10;


  }


  


  if (sign)


    target[i++] = '-';


        


  while (sp < MAXDIGITS)


    target[i++] = stack[sp++];


        


  target[i] = 0;


}


 

jbode

 Profile Answers by jbode Questions by jbode

• Sep 20th, 2011

 

Oh for Pete's sake, what's the point of having an "insert code" option if it munges the code beyond all recognition? Seriously, for a site geared towards programming questions, the support for actually *posting code* is pretty poor.