#include <stdio.h>                      
#include <stdlib.h>                    
 
int main(void)                         
{
  int i;                              
  char buffer[500];                    
 
  printf("Enter a number: ");           
  scanf("%o", &i);     
 
  itoa(i,buffer,10);                    
  printf("decimal: %s\n", buffer);     
 
  itoa(i,buffer,16);
  printf("hexadecimal: %s\n", buffer);  
 
  itoa(i, buffer, 2);                  
  printf("binary: %s\n", buffer);
  return 0;                            
}