Syntax

#include <stdlib.h>
char *_ultoa(unsigned long value, char *string, int radix);

• ultoa converts the digits of the given unsigned long value to a null-terminated character string and stores the result in string. No overflow checking is performed. The radix argument specifies the base of value; it must be in the range of 2 through 36.

  The space allocated for string must be large enough to hold the returned string. The function can return up to 33 bytes, including the null character (\0).

• ultoa returns a pointer to string. There is no error return value.

This example converts the digits of the value 255 to decimal, binary, and hexadecimal representations.

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
   char buffer[10];
   char *p;

   p = _ultoa(255UL, buffer, 10);
   printf("The result of _ultoa(255) with radix of 10 is %s\n", p);
   p = _ultoa(255UL, buffer, 2);
   printf("The result of _ultoa(255) with radix of 2 is %s\n", p);
   p = _ultoa(255UL, buffer, 16);
   printf("The result of _ultoa(255) with radix of 16 is %s\n", p);
   return 0;

   /****************************************************************************
      The output should be:

      The result of _ultoa(255) with radix of 10 is 255
      The result of _ultoa(255) with radix of 2 is 11111111
      The result of _ultoa(255) with radix of 16 is ff
   ****************************************************************************/
}

• ecvt
  
• fcvt
  
• gcvt
  
• itoa
  
• ltoa

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