Thread: What Am I Doing Wrong?

I have been toying with this problem for a bit and it is starting to annoy me. I cannot find the fault in this program. I believe the problem is due to the use of number[index]. Please help, thanks!

Code:

#include<iostream>
#include<string>
#include<cmath>
using namespace std;

int main (void){

        int base, index, total=0;
        string number;
        double counter = 0;

        cout << "\n\nPlease input base: ";
        cin >> base;

        cout << "\nPlease input number: ";
        cin >> number;

        index = (number.length() - 1);

        for(index ; index >= 0 ; index--){
                total += pow(base,counter) *  number[index];       
                counter++;
        }
         
        cout << endl << number << " in base " << base << " is " << total
        << " in base 10.\n";
        
        return 0;
        
}

Well if I run that program I get a bogus answer. For example if I input 2 as the base and 111 as the number the answer should be 7. If I take out number[index] from the highlighted part it works for that number. This is unacceptable, what if my input is base 2 and a number of 101. I would still get 7 when I should get 5.

I thought I was taking the value '1', not ASCII '31'. Should I make number an int, then process it with a modulo instead? Thanks!