Scanner 연습문제02

로그인하기

package play;

import java.util.Scanner;

public class Scanner01 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String ID, PW;
		
		System.out.println("아이디를 입력하세요");
		ID = sc.next();
		System.out.println("비밀번호를 입력하세요");
		PW = sc.next();
		if(PW.equals("1111")) {
			System.out.println("로그인성공");
		}else {
			System.out.println("비밀번호가 틀렸습니다.");
		}
	}

}

---

퀴즈만들기

package play;

import java.util.Scanner;

public class Scanner01 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String q = "Q. 다음중 동물이 아닌것은?.\n"
				+"1. 강아지\n"
				+"2. 고양이\n"
				+"3. 비둘기\n"
				+"4. 취객\n";
		int choice;
		int answer = 4;
		System.out.println(q);
		choice = sc.nextInt();
		
		if(choice == answer) {
			System.out.println("정답입니다.");
		}else {
			System.out.println("오답입니다.");
		}
	}		
}

3항 연산자를 이용해서 만들기

package play;

import java.util.Scanner;

public class Scanner01 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String q = "Q. 다음중 동물이 아닌것은?.\n"
				+"1. 강아지\n"
				+"2. 고양이\n"
				+"3. 비둘기\n"
				+"4. 취객\n";
		int choice;
		int answer = 4;
		String result = "";
		
		System.out.println(q);
		choice = sc.nextInt();
		
		result= choice == answer ?"정답입니다." :"오답입니다";
		System.out.println(result);
		
	}		
}

---

정답을 switch로 받기

package play;

import java.util.Scanner;

public class Scanner01 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String q = "Q. 밥먹으러갈래?.\n"
				+"1. 아니. 나 배불러\n"
				+"2. 뭐먹을래?\n"
				+"3. 국밥!\n"
				+"4. 술먹자\n";
		int choice;
		
		System.out.println(q);
		System.out.print("입력: ");
		choice = sc.nextInt();
		
		switch (choice) {
		case 1: 
			System.out.println("그래...");
			System.out.println("==끝==");
			break;
		case 2: 
			System.out.println("그런걸 물어봐?");
			System.out.println("==끝==");
			break;
		case 3: 
			System.out.println("굳");
			break;
		case 4: 
			System.out.println("미친ㄴ");
			System.out.println("==끝==");
			break;
		default:
			System.out.println("어휴...");
			System.out.println("==끝==");
		}
	}		
}