6-6 编程练习题答案

public class Test
{
	public static void main(String[] args)
	{
		final int NUMBER_OF_PRIMES = 50;
		final int NUMBER_OF_PRIMES_PER_LINE = 10;
		int count = 0;
		int number = 2;
		int[] array = new int[NUMBER_OF_PRIMES];

		System.out.println("The first 50 prime numbers are: ");

		while(count < NUMBER_OF_PRIMES)
		{
			boolean isPrime = true;
			for(int divisor = 2; divisor <= Math.pow(number, 0.5); divisor++)
			{
				if(number % divisor == 0)
				{
					isPrime = false;
					break;
				}
			}
			if(isPrime == true)
				array[count++] = number;
			number++;
		}

		for(int i = 0; i < 50; i++)
		{
			if((i + 1) % NUMBER_OF_PRIMES_PER_LINE == 0)
				System.out.println(array[i]);
			else
				System.out.print(array[i] + " ");
		}
	}
}