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