ouchi > Practice > Study04-03

import java.util.Arrays;
import java.util.Scanner;
 
/** 3の倍数と7の倍数を配列に格納 **/
public class Study04_03 {
 
	public static void main(String[] args) {
 
		Scanner scan = new Scanner(System.in);
 
		System.out.println("100以下の自然数を入力してください");
		int n = scan.nextInt();
 
		int numOfElement = n / 3 + n / 7 - n / 21;
		int [] result = new int[numOfElement];
		int count = 0;
 
		for (int i = 1; i <= n; i++) {
			if (i % 3 == 0 || i % 7 == 0) {
				result[count++] = i;
			}
		}
		System.out.println(Arrays.toString(result));
 
		int sumAll = 0;
		int sumOdd = 0;
		int sumEven = 0;
		for (int element : result) {
			sumAll += element;
			if (element % 2 == 0) {
				sumEven += element;
			} else {
				sumOdd += element;
			}
		}
 
		System.out.println("配列の全要素の和: " + sumAll);
		System.out.println("配列に含まれる奇数の和: " + sumOdd);
		System.out.println("配列に含まれる偶数の和: " + sumEven);
 
	}
 
}