Emulate Python's for-else construct in C++.

prime.cpp

#include <iostream>

// Emulate the for-else Python construct in C++.
// http://docs.python.org/2/tutorial/controlflow.html#break-and-continue-statements-and-else-clauses-on-loops

int main() {
  for (int n = 2; n < 10; n++) {
    bool success = true;
    for (int x = 2; x < n || (success = false); x++) {
      if (n % x == 0) {
        std::cout << n << " equals " << x << " * " << n / x << "\n";
        break;
      }
    }
    if (!success) {
      // loop fell through without finding a factor
      std::cout << n << " is a prime number\n";
    }
  }
}