POJ 2105

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

int main()
{
    //freopen("acm.acm","r",stdin);
    int num;
    int i;
    int j;
    int tem;
    int index;
    int sum;
    string s;
    cin>>num;
    getchar();
    while(num --)
    {
        index = 0;
        getline(cin,s);
        for(i = 0; i < 4; ++ i)
        {
            sum = 0;
            for(j = index; j < 8+index; ++ j)
            {
                tem = s[j] - ‘0‘;
                if(tem == 1)
                    sum += pow(double(2),index+8-j-1)*tem;
            }
            index += 8;
            if(i != 3)
                cout<<sum<<".";
            else
                cout<<sum;
        //    cout<<"    index "<<index<<endl;
        }
        cout<<endl;
    }
}