Standards / Extensions | C or C++ | Dependencies |
---|---|---|
z/OS® UNIX | both | z/OS V1R5 |
#define _OPEN_SYS_ITOA_EXT
#include <stdlib.h>
char * utoa(unsigned int n, char * buffer, int radix);
(void) sprintf(buffer, "%u", n);
with
buffer the returned character string. When the radix is OCTAL, utoa()
formats unsigned integer n into an octal constant. When the radix
is HEX, utoa() formats unsigned integer n into a hexadecimal constant.
The hexadecimal value will include lower case abcdef, as necessary.String pointer (same as buffer) will be returned. When passed an invalid radix argument, function will return NULL and set errno to EINVAL.
This is a non-standard function. Even though the prototype given is commonly used by compilers on other platforms, there is no guarantee that this function will behave the same on all platforms, in all cases. You can use this function to help port applications from other platforms, but you should avoid using it when writing new applications, in order to ensure maximum portability.
/* CELEBU10
This example reads an unsigned int and formats it to decimal,
octal, hexadecimal constants converted to a character string.
*/
#define _OPEN_SYS_ITOA_EXT
#include <stdio.h>
#include <stdlib.h>
int main ()
{
unsigned int i;
char buffer [sizeof(unsigned int)*8+1];
printf ("Enter a number: ");
if (scanf ("%u",&i) == 1) {
utoa (i,buffer,DECIMAL);
printf ("decimal: %s\n",buffer);
utoa (i,buffer,HEX);
printf ("hexadecimal: %s\n",buffer);
utoa (i,buffer,OCTAL);
printf ("octal: %s\n",buffer);
}
return 0;
}
Output
decimal: 1234
hexadecimal: 4d2
octal: 2322