itoa is not part of the c or c++ standard, after all these years. Ain't that a kick in the head?

defined in stdlib.h

Convert integer to string.
Converts an integer value to a null-terminated string using the specified radix and stores the result in the given buffer.

If radix is 10 and value is negative the string is preceded by the minus sign (-). With any other radix, value is always considered unsigned.

buffer should be large enough to contain any possible value: (sizeof(int)*8+1) for radix=2, i.e. 17 bytes in 16-bits platforms and 33 in 32-bits platforms.

Syntax

char *itoa( int value, char *buffer, int radix )

Parameters

• valueValue to be represented as a string.
• buffer Buffer where to store the resulting string.
• radix Numeral radix in which value has to be represented, between 2 and 36.

Return ValueA pointer to the string.

Portability

Not defined in ANSI-C. Supported by some compilers.

Example

/* itoa example */

include 
include 


int main ()
{
  int i;
  char buffer [33];
  printf ("Enter a number: ");
  scanf ("%d",&i);
  itoa (i,buffer,10);
  printf ("decimal: %s\n",buffer);
  itoa (i,buffer,16);
  printf ("hexadecimal: %s\n",buffer);
  itoa (i,buffer,2);
  printf ("binary: %s\n",buffer);
  return 0;
}


Output:
Enter a number: 1750
decimal: 1750
hexadecimal: 6d6
binary: 11011010110

See also:

• programming c:function atof, atol, ecvt, fcvt, gcvt, strtod