我哪错了？！

#include <iostream>

#include <cmath>

using namespace std;

int main()

{

int T;

cin >> T;

int n;

char* str[T];

int k = T;

while(T > 0)

{

int flag = 1;

cin >> n;

if(n == 1)

{

str[T-1] = "No";

flag = 0;

}

for(int i = 2;i < sqrt(n);i++)

{

if(n % 10 == 0)

{

str[T-1] = "No";

flag = 0;

break;

}

}

if(flag == 1)

{

str[T - 1] = "Yes";

}

T--;

}

for(int i = k - 1;i >= 0;i--)

{

cout << str[i] << endl;

}

return 0;

}