java/W1-李鑫怡-202506050312/TemperatureConverter.java

import java.util.Scanner;

// 温度转换：摄氏(C) ↔ 华氏(F)
public class TemperatureConverter {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入带有符号的温度值: ");
        String input = scanner.nextLine();
        scanner.close();

        // 空输入直接报错
        if (input.length() < 2) {
            System.out.println("输入格式错误");
            return;
        }

        // 取最后一位为单位，前面为数值字符串
        char unit = input.charAt(input.length() - 1);
        String numStr = input.substring(0, input.length() - 1);

        try {
            double num = Double.parseDouble(numStr);
            double result;
            char resUnit;

            if (unit == 'C' || unit == 'c') {
                // 摄氏 → 华氏
                result = 1.8 * num + 32;
                resUnit = 'F';
            } else if (unit == 'F' || unit == 'f') {
                // 华氏 → 摄氏
                result = (num - 32) / 1.8;
                resUnit = 'C';
            } else {
                System.out.println("输入格式错误");
                return;
            }

            // 输出保留两位小数
            System.out.printf("转换后的温度是%.2f%c%n", result, resUnit);
        } catch (NumberFormatException e) {
            System.out.println("输入格式错误");
        }
    }
}