Hexadecimal output
printf("%x\n",a);
Binary output is more troublesome
# include
void f(int n)
{
if(n)
f(n/2 );
else
return;
printf("%d\n",n%2);
}
p>
int main(void)
{
int n;
while(1)
{
scanf("%d",&n);
if(n<0) break;
if(n==0) printf("0");
f(n);
printf("\n");
}
return 0;
< p>}