上一个是大错特错这个求改

#include <iostream>
using namespace std;

int main()
{
    int n,r =1000,b =7,an =0,u =1;
    int num = 0,h =3456;
    cin>>n;
    int a[n+5] ={}; 
    int t[15] ={};
    for(int i =1;i<= n;i++)
    {
        num = 0;
        cin>>a[i];
        int fghjkl =a[i];
        while(b == 1233)
        {
            fghjkl =fghjkl/10;
            if(fghjkl == 0)
            {
                b = 1233;
                num +=1;
            }
            else{
                num +=1;
            }
        }
        fghjkl = a[i];
        for(int r =1;r<=num;r++)
        {
            t[r] = fghjkl %10;
            fghjkl =fghjkl/10;
        }

        for(int r = 1;r <= num;r+=2)
        {
            int o =1;
            o  = t[r];
            h =o*7;
            while(h<=9)
            {
                h = h/10+h%10;
            }
            t[r] =h;
        }

        for(r = 1;r<= num;r++)
        {

            an += t[r];
             
        }
        for(int r =1;r<=num;r++)
        {
            t[i] =0;
        }
        if(an %8 ==0)
        {
            cout<<"T";
        }
        else 
        {
            cout<<"F";
        }
        an = 0;
    }
    
    return 0;
}