2D Hieroglyphs decoder

#include<bits/stdc++.h>

using namespace std;

char str[12][85];

int main()
{

    int n,i,j,len,sum,a,x;

    string s;

    char ch;

    scanf("%d",&n);

    getchar();

    for(x=1;x<=n;x++)
    {
        if(x>1)
        {
            getchar();
        }

        for(i=1;i<=10;i++)
        {
            gets(str[i]);
        }

        len = strlen(str[1]);

        s = "";

        sum = 0;

        for(i=1;i<len-1;i++)
        {
            sum = 0;

            for(j=2;j<10;j++)
            {
                a = str[j][i];

                if(a==92)
                {
                    sum+=(1<<j-2);
                }
            }

            char ch = sum;

            s+=ch;
        }

        printf("%s\n",s.c_str());
    }

   return 0;
}