Untitled

#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream inputFile("promienie.txt", ios::in);
	ofstream outputFile("wyniki.txt", ios::out);

	double r1, r2;
	if (inputFile.is_open())
	{
		inputFile >> r1 >> r2;
		inputFile.close();
	}
	else
	{
		cout << "Blad odczytu pliku promienie.txt!" << endl;
		return -1;
	}

	double field1 = 3.14 * r1 * r1;
	double field2 = 3.14 * r2 * r2;

	if (outputFile.is_open())
	{
		if (field2 < field1)
		{
			outputFile << field2 << '\n' << field1;
		}
		else
		{
			outputFile << field1 << '\n' << field2;
		}
		outputFile.close();
	}
	else
	{
		cout << "Blad zapisu pliku wynik.txt!" << endl;
		return -1;
	}

    return 0;
}