/* oct2any.c */
#include <stdio.h>

const int BitSize = sizeof(int) * 8;
void dtob(int x) ;

int main(void)
{
  int x;

  printf("input octal number :");
  scanf("%o",&x);
  printf("deciaml  number      : %d\n",x);
  printf("octal number         : %o\n",x);
  printf("hexadeciaml number   : %x\n",x);
  dtob(x);

  return 0;
}

void dtob(int x) {
  int bit = 1, i;
  char c[BitSize];
  
  for (i = 0; i < BitSize; i++) {
    if (x & bit)
      c[i] = '1';
    else 
      c[i] = '0';
    bit <<= 1;
  }
 
  printf("binar number         : ");
  for ( i = BitSize - 1; i >= 0; i-- ) {
      putchar(c[i]);
  }
  printf("\n");
}