[Java] 6. 연산자_6.섭씨온도문제

1. 화씨 → 섭씨

package ex02;

import java.util.Scanner;

public class FtoC1 {
    public static void main(String[] args) {

        // 식1 C = 5/9(F - 32)
        // 식2 F = (1.8*C) + 32

        double f;
        double c;

        // 1. 화씨(F) 온도를 받아서
        System.out.println("===============");
        System.out.println("1. 화씨 - > 섭씨");
        System.out.println("===============");
        System.out.println();
        System.out.println("화씨 온도를 입력하시오: ");

        Scanner sc = new Scanner(System.in);
        f = sc.nextDouble();

        // 2. 섭씨(C) 온도로 환산
        c = 5.0 / 9.0 * (f - 32.0);

        // 3. 모니터 출력
        System.out.println(c);

C:\workspace\tools\jdk-21\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\lib\idea_rt.jar=52391:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\workspace\java_lec\study\out\production\study ex02.FtoC1
===============
1. 화씨 - > 섭씨
===============

화씨 온도를 입력하시오: 
100
37.77777777777778

Process finished with exit code 0

2. 섭씨 → 화씨

package ex02;

import org.w3c.dom.ls.LSOutput;

import java.util.Scanner;

public class FtoC2 {
    public static void main(String[] args) {
        // 식1 C = 5/9(F - 32)
        // 식2 F = (1.8*C) + 32

        double c;
        double f;

        // 1. 섭씨(C) 온도를 받아서
        System.out.println("===============");
        System.out.println("1. 섭씨 - > 화씨");
        System.out.println("===============");
        System.out.println();
        System.out.println("섭씨 온도를 입력하시오: ");
        Scanner input = new Scanner(System.in);
        c = input.nextDouble();

        // 2. 화씨(F) 온도로 환산
        f = (1.8 * c) + 32;

        // 3. 모니터 출력
        System.out.println("섭씨 온도는 " + f);

C:\workspace\tools\jdk-21\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\lib\idea_rt.jar=52420:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\workspace\java_lec\study\out\production\study ex02.FtoC2
===============
1. 섭씨 - > 화씨
===============

섭씨 온도를 입력하시오: 
37.77777777777778
섭씨 온도는 100.0

Process finished with exit code 0

3. 섭씨, 화씨 둘 중 선택 (삼항연산자 사용)

package ex02;

import java.util.Scanner;

public class FtoC3 {
    public static void main(String[] args) {


        // 1. 화씨 혹은 섭씨 선택
        Scanner sc = new Scanner(System.in);
        int selectednumber = sc.nextInt();

        // 2. 화씨 혹은 섭씨 온도 받기
        System.out.println("온도를 입력하시오: ");
        double temp = sc.nextDouble();

        // 3. 화씨 혹은 섭씨 온도 받아서 변환하기
        double result = selectednumber == 1 ? (5.0 / 9.0 * (temp - 32)) : (1.8 * temp + 32);
        System.out.println("온도는: " + result);

C:\workspace\tools\jdk-21\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\lib\idea_rt.jar=52313:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\workspace\java_lec\study\out\production\study ex02.FtoC3
100
온도를 입력하시오: 
37.77777777777778
온도는: 100.0

Process finished with exit code 0