题解 | #素数判断#

代码如下：

#include <iostream>

using namespace std;
int number;

bool judge(int number) {
  if (number == 1) return false;
  if (number == 2) return true;
  for (int i = 2; i*i <= number; i++)
    if (number % i == 0) return false;
  return true;
}

int main() {
  int t;
  cin >> t;
  while (t--) {
    cin >> number;
    if (judge(number)) cout << "Yes\n";
    else cout << "No\n";
  }
  return 0;
}