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83 lines
2.8 KiB
83 lines
2.8 KiB
//TIP 要<b>运行</b>代码,请按 <shortcut actionId="Run"/> 或
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// 点击装订区域中的 <icon src="AllIcons.Actions.Execute"/> 图标。
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import java.util.Scanner;
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public class TemperatureConverter {
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/**
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* 将摄氏度转换为华氏度。
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*
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* @param c 摄氏温度
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* @return 对应的华氏温度
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*/
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public static double celsiusToFahrenheit(double c) {
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return c * 9.0 / 5.0 + 32.0;
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}
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/**
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* 将华氏度转换为摄氏度。
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*
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* @param f 华氏温度
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* @return 对应的摄氏温度
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*/
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public static double fahrenheitToCelsius(double f) {
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return (f - 32.0) * 5.0 / 9.0;
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}
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public static void main(String[] args) {
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Scanner scanner = new Scanner(System.in);
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System.out.print("请输入要转换的温度与单位(例如 36.6 C 或 97 F):");
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String input = scanner.nextLine().trim();
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if (input.isEmpty()) {
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System.out.println("输入为空,程序退出。");
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scanner.close();
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return;
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}
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// 使用正则表达式增强解析能力(兼容 "36.6C"、"97 F" 等)
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input = input.replaceAll("\\s+", " "); // 合并多个空格为一个
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String[] parts = input.split(" ");
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double value;
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String unit;
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try {
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if (parts.length == 1) {
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// 尝试从单个字符串中提取数字和单位(如 "36.6C")
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String s = parts[0];
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int i = 0;
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while (i < s.length() && (Character.isDigit(s.charAt(i)) || s.charAt(i) == '.' || s.charAt(i) == '+' || s.charAt(i) == '-')) {
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i++;
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}
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if (i == 0 || i == s.length()) {
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throw new NumberFormatException("无法解析数值或单位");
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}
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value = Double.parseDouble(s.substring(0, i));
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unit = s.substring(i).toUpperCase().trim();
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} else if (parts.length >= 2) {
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value = Double.parseDouble(parts[0]);
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unit = parts[1].toUpperCase().trim();
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} else {
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throw new IllegalArgumentException("输入格式不正确");
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}
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} catch (Exception e) {
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System.out.println("输入解析失败,请按示例输入数值与单位,例如:36.6 C");
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scanner.close();
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return;
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}
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if (unit.startsWith("C")) {
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double f = celsiusToFahrenheit(value);
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System.out.printf("%.2f °C = %.2f °F%n", value, f);
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} else if (unit.startsWith("F")) {
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double c = fahrenheitToCelsius(value);
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System.out.printf("%.2f °F = %.2f °C%n", value, c);
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} else {
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System.out.println("未知单位,请使用 C 或 F。");
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}
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scanner.close();
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}
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}
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