Untitled

#include <iostream>
#include <fstream>
using namespace std;

double calculateFunction(double x) {
	return x * x + 5 * x - 4;
}

int main() {
	int N;
	double A, d;

	cout << "Enter the number of points N: ";
	cin >> N;

	cout << "Enter the left boundary A: ";
	cin >> A;

	cout << "Enter the offset d: ";
	cin >> d;

	ofstream outputFile("t.txt");

	if (outputFile.is_open()) {
		double x = A;
		for (int i = 0; i < N; i++) {
			double y = calculateFunction(x);
			outputFile << "x = " << x << ", y = " << y << endl;
			x += d;
		}
		outputFile.close();
		cout << "Values have been written to output.txt" << endl;
	}
	else {
		cout << "Error opening file." << endl;
	}

	return 0;
}