package programming.set6.optimus;

import acm.program.ConsoleProgram;

/**
 * File: SieveOfEratosthenes.java
 * ------------------------------
 * This class should print the primenumbers up to a number the users enters.
 *
 */

public class SieveOfEratosthenes extends ConsoleProgram {

	public void run() {
		int number1;
		while (true) {
			int tillNumber = readInt("To which number should the program show the prime numbers? ");
			if (tillNumber >=2) {
				number1 = tillNumber;
				break;
			}
		}
		boolean numberX[]= new boolean[number1];
			for(int i = 2;i <= number1; i++) {
			if (isPrimeNumber(i)) {
				println(i);
			}
		}
	}

	public boolean isPrimeNumber(int num) {
		for (int i = 2; i < num; i++) {
			if (num % i == 0) {
				return false;
			}
		}
		return true;
	}


	public static void main(String[] args) {
		new SieveOfEratosthenes().start();

	}

}