#include "stdafx.h"
#include <iostream>

using namespace std;

#define BASE 6

#define _DEBUG_

using namespace std;

int main()
{
	int inputNum, digit, baseToThePower_i = 1, decimalEquiv = 0;
	int digitErrorFlag = 0;

	cout << "Enter an integer number in base " << BASE << ":";
	cin >> inputNum;

	while (inputNum > 0) {
		digit = inputNum % 10;
		inputNum /= 10;
#ifdef _DEBUG_
		cout << digit << " : ";
#endif
		if (digit >= BASE) {
			cout << "Error! There's an invalid digit " << digit << endl;
			digitErrorFlag = 1;
			break;
		}
#ifdef _DEBUG_
		cout << " " << BASE << "^i = " << baseToThePower_i;
#endif
		int ithTerm = baseToThePower_i * digit;

#ifdef _DEBUG_
		cout << " ith term = " << ithTerm << endl;
#endif
		baseToThePower_i *= BASE;

		decimalEquiv += ithTerm;
	}

	if (digitErrorFlag == 0)
		cout << "The decimal equivalent is : " << decimalEquiv << endl;

	return 0;
}