問題8.クラスメソッド

public class QXX {

    // ここにあなたがクラスメソッドを追加する
    public static void main(String[] args) {

        // ここに、あなたが追加したメソッドをテストするコードを追加する
    }
}

    public static void main(String[] args) {
        sayHello("imai");
    }

public class Q17 {

    public static void main(String[] args) {

        int[] scores = {60, 53, 5, 68, 82, 70, 83, 12, 3, 72, 38, 68, 92, 15, 92, 48, 13, 14, 80};
        int[] ages = {22, 29, 28, 29, 26, 23, 30, 23, 27, 23, 28, 28, 26, 27, 26, 28, 30, 25, 22};

        int sum = 0;
        double avg = 0;

        for (int i = 0; i < scores.length; i++) {
            sum += scores[i];
        }

        System.out.println("合計点数:" + sum);

        System.out.println("平均点数:" + sum / scores.length);

        for (int i = 0; i < ages.length; i++) {
            avg += ages[i];
        }
        avg = avg / ages.length;

        System.out.println("平均年齢:" + avg);
    }
}

package p08;

public class Q17 {

    public static void main(String[] args) {

        int[] scores = {60, 53, 5, 68, 82, 70, 83, 12, 3, 72, 38, 68, 92, 15, 92, 48, 13, 14, 80};
        int[] ages = {22, 29, 28, 29, 26, 23, 30, 23, 27, 23, 28, 28, 26, 27, 26, 28, 30, 25, 22};

        int sum = 0;
        double avg = 0;

        System.out.println("合計点数:" + sum(scores));

        System.out.println("平均点数:" + sum(scores) / scores.length);

        System.out.println("平均年齢:" + sum(ages)/ages.length);
    }
    
    //ここに切り出したsumメソッドを書く
}

package p08;

public class Q18 {

    public static void main(String[] args) {
        int[] iscores = {60, 53, 5, 68, 82, 70, 83, 12, 3, 72, 38, 68, 92, 15, 92, 48, 13, 14, 80};
        double[] dweights = {54.7, 86.1, 82.5, 65.4, 98.9, 75.2, 81.9, 58.9, 94.4, 91.9, 90.9, 88.3, 76.8, 57.3, 68.1, 69.7, 58.6, 99.5, 93.9};
        int sumI = sum(iscores);
        int sumD = sum(dweights);
        System.out.println("スコア合計：" + sumI);
        System.out.println("体重合計：" + sumD);
    }

    public static int sum(int[] num) {
        int sum = 0;
        for (int i = 0; i < num.length; i++) {
            sum += num[i];
        }
        return sum;
    }

    //ここにオーバーロードしたsumメソッドを書く

}

package p08;

public class Q19 {

    public static void main(String[] args) {
        int num = 1;
        System.out.println(num);
        local();
        System.out.println(num);
    }

    static void local() {
        int num = 2;
        System.out.println(num);
    }
}

package p08;

public class Q20 {

    private static void methodA(int num1, int num2) {
        methodB(num1, num2);
    }

    private static void methodB(int num1, int num2) {
        methodC(num1, num2);
    }

    private static void methodC(int num1, int num2) {
        System.out.println(num1 / num2);
    }

    public static void main(String[] args) {
        methodA(5, 0);
    }
}

package graduation1;

import java.util.Random;
import java.util.Scanner;

public class Q04 {

    public static void main(String[] args) {

        System.out.println("レベルを選んで下さい (１）0～9 （２）0～99 （３）0～999 ");

        Scanner scanner = new Scanner(System.in);

        Random random = new Random();

        int answer = 0;
        int level = 0;
        while (level < 1 || 3 < level) {

            level = scanner.nextInt();

            switch (level) {
                case 1:
                    answer = random.nextInt(9);
                    break;
                case 2:
                    answer = random.nextInt(99);
                    break;
                case 3:
                    answer = random.nextInt(999);
                    break;
                default:
                    System.out.println("もう一度レベルを選んでください （１）0～9 （２）0～99 （３）0～999 ");
            }
        }

        System.out.println("秘密の答え：" + answer);

        System.out.println("5回以内に数を当ててね。3回以内ならすごいことだよ。");

        long start = System.currentTimeMillis();

        int i;
        int[] history = {-1, -1, -1, -1, -1};
        for (i = 0; i < 5; i++) {

            System.out.println("キーボードから数値を入力してください");

            Scanner sc2 = new Scanner(System.in);
            
            int inputted = sc2.nextInt();
            
            history[i] = inputted;

            if (answer == inputted) {
                break;

            } else if (answer > inputted) {
                System.out.println("もっと大きいよ");

            } else {
                System.out.println("もっと小さいよ");
            }
        }

        if (i < 3) {
            System.out.println("大あたり！すごいことだよ！");

        } else if (i < 5) {
            System.out.println("あたり。まあまあすごいよ。");

        } else {
            System.out.println("5回以内に答えられなかったのでゲーム終了");
        }

        long end = System.currentTimeMillis();
        System.out.println((end - start) / 1000 + "秒かかったよ");

        System.out.println("次回のために履歴を表示するので参考にしてね");

        for (int j = 0; j <= i; j++) {
            System.out.print(history[j] + "→");
        }
        System.out.print("終了!");
    }
}

package p08;

import java.util.Random;
import java.util.Scanner;

public class Q21StaticMethod {

    public static void main(String[] args) {

        int answer = getAnswer();

        long start = System.currentTimeMillis();

        int i = 0;
        int[] history = {-1, -1, -1, -1, -1};
        i = checkTheAnswer(i, history, answer);

        long end = System.currentTimeMillis();
        System.out.println((end - start) / 1000 + "秒かかったよ");

        showHistory(i, history);
    }
  
  //スタティックメソッドを作成しなさい。