调用方法有问题 [英] Trouble with calling method

问题描述

public static void main (String[] args) {

   for (double f=0; f<=20;f++) {
      System.out.println(f+":Degrees Fahrenheit converted to Celsius = "+ celsius(f));
   }
}

public static double celsius (double fahrenheit) {
    double cels=(fahrenheit-32)/(5/9);
    return cels;
}

通过这个程序，我正在尝试将华氏温度转换为摄氏温度，当我调用方法Celsius到我的主程序，当我运行程序时，Celsius的最终结果总是-infinity。我做错了什么？

With this program I'm trying to convert Fahrenheit to Celsius, and when I call method Celsius to my main when I run the program the end result for Celsius is always -infinity. What am I doing wrong?

推荐答案

你正在进行int division，它总是返回一个int。例如 5/9 返回0.

You're doing int division which always returns an int. For example 5/9 returns 0.

而是使用双重分割 5.0 / 9.0

对于您的代码：

public static double celsius (double fahrenheit) {
    return (fahrenheit - 32) / (5.0 / 9.0);
}

我们应该将此问题视为重复，因为它被多次询问。例如： fahrenheit-to-celsius-conversion -yields-only-0-0-and-0-0

We should probably close this question as a duplicate as it's been asked many many times. For example: fahrenheit-to-celsius-conversion-yields-only-0-0-and-0-0

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