#include <iostream>
#include <vector>
#include <cmath>
using std::cin;
using std::cout;
using std::endl;

int convert_bin_to_dec(const char char_num[], int size);
//Assumes that char_num[] is a C style string terminated by the '/0' character.

int main()
{
    int test_size1 = 5, test_size2 = 9;
    char test_num1[5] = { '1', '0', '1', '0', '/0'};
    char test_num2[9] = { '0', '1', '1', '0', '1', '0', '1', '1', '/0'};
    int test_result1 = convert_bin_to_dec(test_num1, test_size1);
    int test_result2 = convert_bin_to_dec(test_num2, test_size2);

    cout << "1010 converted to " << test_result1 << endl;
    cout << "01101011 converted to " << test_result2 << endl;

    return 0;
}

int convert_bin_to_dec(const char char_num[], int size)
{
    int increment = 0, decimal = 0;
    std::vector<int> int_num(size-1);
    std::vector<int>::reverse_iterator rnum_iterator;

    for(int i=0; i<size-1; i++)
        int_num.push_back(char_num[i] - '0');

    for(rnum_iterator = int_num.rbegin(); rnum_iterator != int_num.rend(); rnum_iterator++)
    {
        if(increment==0 && *rnum_iterator == 1)
            decimal += 1;
        else if(increment!=0 && *rnum_iterator == 1)
            decimal += pow(2, increment);

        increment++;
    }

    return decimal;
}