This program was written in Visual C++ Express on a CLR Console Application template. The problem that I'm having is that the program won't run when I hit Ctrl+F5 and I get an error message that says 'There were building errors'. My guess is that the <math.h> library might not be included in the express edition or perhaps I haven't installed it or something. But I wanted to post it here just in case I was missing any obvious mistake that I'm not seeing.Code:#include <stdafx.h> #include <iostream> #include <math.h> using namespace std; int main() { int n; // Number to test for prime-ness int i; // Loop counter int is_prime; // Boolean flag //Assume that a number is prime until proven //otherwise is_prime = true; //Get a number from the keyboard. cout << "Enter a number and press ENTER: "; cin >> n; //Test for prime-ness by checking for divisibility //by all whole numbers from 2 to sqrt(n). i = 2; while (i <= sqrt(static_cast<double>(n))) { if (n % i == 0) is_prime = false; i++; } //Print results if (is_prime) cout << "Number is prime."; else cout << "Number is not prime."; return 0; }

NOTE: This is a noob programmer speaking. Been writing code for about 4 days total so keep that in mind.