mokomokohitsuzi

import java.util.Scanner;

public class En3_13 {

	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);

		System.out.print("整数値A：");
		int a = stdIn.nextInt();

mokomokohitsuzi

import java.util.Scanner;

public class En3_14 {
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);

		System.out.print("整数値a：");
		int a = stdIn.nextInt();

		System.out.print("整数値b：");

mokomokohitsuzi

import java.util.Scanner;

public class En3_15 {

	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);

		System.out.print("整数値a：");
		int a = stdIn.nextInt();

mokomokohitsuzi

import java.util.Scanner;

public class En3_16 {

	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);

		System.out.print("整数値a：");
		int a = stdIn.nextInt();

mokomokohitsuzi

import java.util.Random;

public class En3_17 {
	public static void main(String[] args) {
		Random rand = new Random();

		// ランダムで0～2までの乱数を生成。
		int janken = rand.nextInt(3);

		switch (janken) {

mokomokohitsuzi

import java.util.Scanner;

public class En3_18 {
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);

		System.out.print("月を整数値で入力してください(1～12)：");
		int month = stdIn.nextInt();

		//1～12までの入力で季節を分ける。

mokomokohitsuzi

import java.util.Scanner;

public class En4_1 {
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);

		// ループ用変数の作成
		int retry;
		do {
			System.out.print("整数値：");

mokomokohitsuzi

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

public class En4_2 {
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		Random rand = new Random();

		// 乱数0～89を作り、それに+10する。
		int no = rand.nextInt(90) + 10;

mokomokohitsuzi

import java.util.Scanner;

public class En4_3 {
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);

		System.out.print("整数A：");
		int a = stdIn.nextInt();

		System.out.print("整数B：");

mokomokohitsuzi

import java.util.Scanner;

public class En4_4 {
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);

		System.out.println("カウントダウンします。");

		int x;
		do {