#include <iostream>
#include <cmath>
#include <string>
using namespace std;
void bitodec(int);
int y =1;
int u  ;
int main(void)
{
    string input;
    cout << "Enter string of binary digits " ;
    cin >> input ;
    for_each(input.begin(), input.end(),bitodec);
    cout << "Decimal equivalent is  " << u << endl;
     system("PAUSE");
}
void bitodec(int i)
{
     
     
     if(i != 0)
     {
     int u = pow(2.0, (int)y);
     u = u +u ;
     }
     else
     {
         ;
     }
     y++;
     
     
}