Added a pause before ending

ProjectEuler/C++/Problem12.cpp

@@ -38,6 +38,8 @@ int main(){
 	std::cout << "The triangular number " << sum << " is made with all number >= " << counter - 1 << " and has " << countDivisors << " divisors" << std::endl;
 	std::cout << "The problem took " << std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::high_resolution_clock::duration(endTime - startTime)).count() << " milliseconds" << std::endl;
 
+	std::cin.get();
+
 	return 0;
 }