Rename GreatestCommonDivisor.cpp#include <iostream> #include <cmath>  using namespace std;  int main() { 	while (true) 	{  		int firstNumber, secondNumber; 		cin >> firstNumber >> secondNumber;  		int reminder = 0;  		while (secondNumber != 0) 		{ 			reminder = firstNumber % secondNumber; 			firstNumber = secondNumber; 			secondNumber = reminder; 		}  		cout << firstNumber << " is the GCD." << endl; 		cout << endl; 	}  	system("pause"); 	return 0; } to GreatestCommonDivisor.cpp