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ultoa, _ultow

Header File

stdlib.h

Category

Conversion Routines, Math Routines

Prototype

char *ultoa(unsigned long value, char *string, int radix);

wchar_t *_ultow(unsigned long value, wchar_t *string, int radix);

Description

Converts an unsigned long to a string.

ultoa converts value to a null-terminated string and stores the result in string. value is an unsigned long.

radix specifies the base to be used in converting value; it must be between 2 and 36, inclusive. ultoa performs no overflow checking, and if value is negative and radix equals 10, it does not set the minus sign.

Note: The space allocated for string must be large enough to hold the returned string, including the terminating null character (\0). ultoa can return up to 33 bytes.
Return Value

ultoa returns string.

Example

Copy Code

    #include <stdlib.h>
    #include <stdio.h>
    int main( void )
    {
       unsigned long lnumber = 3123456789L;
       char string[25];
       ultoa(lnumber,string,10);
       printf("string = %s  unsigned long = %lu\n",string,lnumber);
       return 0;
    }

Portability

| POSIX | Win32 | ANSI C | ANSI C++
ultoa |  | + |  |
_ultow |  | + |  |

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