text: #include<iostream>
  #include<cmath>
  using namespace std;
  int main()
  {
  	int i, n;
      bool isPrime = true;
  	cout << "Enter a positive integer: ";
      cin >> n;
      
      if (n == 0 || n == 1) {
          isPrime = false;
      }
      else {
          for (i = 2; i <= n / 2; ++i)
  		{
              if (n % i == 0) {
                  isPrime = false;
                  break;
              }
          }
      }
      if (isPrime)
          cout << n << " is a prime number";
      else
          cout << n << " is not a prime number";
  
      return 0;
  }
  