就我一个用Bool函数吗？

#include<bits/stdc++.h>
using namespace std;
int n;
long long a[105];
bool ok(long long x){
    int sum = 0;
    int id = 1;
    while(x > 0){
        int m = x % 10;
        x/= 10;
        if(id % 2 == 1){
            m *= 7;
            while(m > 9){
                int k = 0;
                while(m > 0){
                    k += m % 10;
                    m /= 10;
                }
                m = k;
            }
        }
        sum += m;
        id++;
    }
    return (sum % 8 == 0);
}
int main(){
	cin>>n;
    for(int i = 1;i <= n;i++){
        cin>>a[i];
        if(ok(a[i]) == true){
            cout<<"T\n";
        }
        else{
            cout<<"F\n";
        }
    }
    return 0;
}