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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n, i;
  6.   bool isPrime = true;
  7.  
  8.   cout << "Enter a positive integer: ";
  9.   cin >> n;
  10.  
  11.   for(i = 2; i <= n / 2; ++i)
  12.   {
  13.       if(n % i == 0)
  14.       {
  15.           isPrime = false;
  16.           break;
  17.       }
  18.   }
  19.   if (isPrime)
  20.       cout << "This is a prime number";
  21.   else
  22.       cout << "This is not a prime number";
  23. 	// your code goes here
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 15224KB
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stdin
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10000009
stdout
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Enter a positive integer: This is not a prime number
https://ideone.com/q1uQ7O
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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