if - else 반복문 문제 풀이

백준 14681번

<if - else>

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int x = sc.nextInt();
		int y = sc.nextInt();
		sc.close();

		if (x > 0) {
			if(y > 0)
				System.out.println(1);
			else 
				System.out.println(4);
		}
		else 
			if (y > 0)
				System.out.println(2);
			else 
				System.out.println(3);
	}
}

 

<삼항연산자>

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int x = sc.nextInt();
		int y = sc.nextInt();
		sc.close();

		System.out.println((x > 0) ? ((y > 0) ? 1 : 4) : ((y > 0) ? 2 : 3));
	}
}

 

 

백준 2884번

import java.util.Scanner;

public class Main {  
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int hour = sc.nextInt();
		int min = sc.nextInt();
		sc.close();

		if (hour != 0) {
			if (min >= 45) 
				min -= 45;
			else if (min < 45 && min > 30) {
				hour -= 1;
				min += 15;  // min = 60 - (45 - min);
			}
			else if (min <= 30) {
				hour -= 1;
				min += 15;   // min = 60 - (45 - min);
			}
		}
		else if (hour == 0) {
			if (min >= 45) 
				min -= 45;
			else if (min < 45 && min > 30) {
				hour = 23;
				min += 15;   // min = 60 - (45 - min);
			}
			else if (min <= 30) {
				hour = 23;
				min += 15;   // min = 60 - (45 - min);
			}
		}
		System.out.println(hour + " " + min);
	}
}

 

백준 문제 추가로 2문제 더 풀어봤습니다.(14681번, 2884번)

감사합니다!