# include <stdio.h>

//
//  Program 8.14, Stephen Kochan, Programming in C.
//
int convertedNumber[64];
long int numberToConvert;
int base;
int digit = 0;

int main ( void );
void getNumberAndBase ( void );
void convertNumber ( void );
void displayConvertedNumber ( void );

int main ( void )
{
  getNumberAndBase ( );
  convertNumber ( );
  displayConvertedNumber ( );

  return 0;
}

void getNumberAndBase ( void )
{
  printf ( "Number to be converted?: " );
  scanf ( "%li", &numberToConvert );

  printf ( "Base? " );
  scanf ( "%i", &base );

  if ( base < 2 || 16 < base )
  {
    printf ( "Bad base - must be between 2 and 16.\n" );
    base = 10;
  }
  return;
}

void convertNumber ( void )
{
  do 
  {
    convertedNumber[digit] = numberToConvert % base;
    digit = digit + 1;
    numberToConvert = numberToConvert / base;
  } while ( numberToConvert != 0 );

  return;
}


void displayConvertedNumber ( void )
{
  const char baseDigits[16] = 
    { '0', '1', '2', '3', '4', '5', '6', '7',
      '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
  int nextDigit;

  printf ( "Converted number = " );

  for ( digit = digit - 1; 0 <= digit; digit = digit - 1 )
  {
    nextDigit = convertedNumber[digit];
    printf ( "%c", baseDigits[nextDigit] );
  }
  printf ( "\n" );

  return;
}