Java温度转换器计算异常：74°F转换结果不符合预期

你的转换公式存在两个关键问题：

• 运算顺序完全颠倒：正确逻辑是先将华氏温度减去32，再乘以转换系数，你现在是先乘后减，这是结果错误的核心原因
• 系数精度不足：用0.556近似5/9（实际是0.555555...），虽然不是主要问题，但用5.0/9.0能保证计算精度

正确的华氏转摄氏公式为：
tempC = (tempF - 32.0) * 5.0 / 9.0;

把你代码里的错误公式行：

tempC = ((tempF * 0.556) - 32.00);

替换成上面的正确公式后，输入74华氏度就能得到约23.33摄氏度的正确结果。

修正后的完整代码：

import java.util.Scanner;

public class TempConverter {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        System.out.print("What's the temperature outside?");

        double tempF = input.nextInt();

        if (tempF < 45.00) {
            System.out.println(tempF + " degrees? Oh it's a little chilly out there");
        } else {
            System.out.println("Unless it's raining, sounds like a beautiful day!");
        }

        System.out.println("We use a bit of an outdated measurement system over here stubborn as we are. Let's convert that to a measurement you're more familiar with");

        double tempC;
        // 修正后的转换公式
        tempC = (tempF - 32.0) * 5.0 / 9.0;

        System.out.println(tempF + " degrees fahrenheit here in the States should feel like " + tempC + " Celsius back home. Give or take some humidity depending on where that is exactly :)");
    }
}

内容的提问来源于stack exchange，提问作者dietCokeIsTheDevil