如果任何人都可以提供帮助，我在完成这个计划时会遇到一些麻烦

Question

这是一个问题。对于开尔文和华氏温度之间的转换，使用转换方法在开尔文和摄氏度之间以及摄氏和华氏之间进行转换。修改main（）方法以包含添加的新方法的测试用例。

package projectTwo;
public class projectTwo {

    public static double f2c(double fahrenheit)
    {
        return 5.0 / 9.0 * (fahrenheit - 32.0);
    }

    public static double c2f(double celsius)
    {
        return 9.0 / 5.0 * celsius + 32.0;
    }
    public static double k2c(double kelvin)
    {        
        return 5.0 / 9.0

    public static void main(String[] args)
    {
        System.out.printf("%.2f F => %.2f C%n", 32.0, f2c(32.0));
        System.out.printf("%.2f F => %.2f C%n", 212.0, f2c(212.0));
        System.out.printf("%.2f C => %.2f F%n", 0.0, c2f(0.0));
        System.out.printf("%.2f C => %.2f F%n", 100.0, c2f(100.0));
    }

}

这就是我遇到的问题。

Answer 1

你有错误的{}夫妻。 }方法的末尾缺少一个结尾public static double k2c(double kelvin)。这可能是一个错字，你的代码中没有语法错误，但无论如何请修复它。

另一个错误是打印新行时。您必须使用\n（不是%n，因为您已经使用过）。所以你的代码应该是这样的：

System.out.printf("%.2f F => %.2f C\n", 32.0, f2c(32.0));
System.out.printf("%.2f F => %.2f C\n", 212.0, f2c(212.0));
System.out.printf("%.2f C => %.2f F\n", 0.0, c2f(0.0));
System.out.printf("%.2f C => %.2f F\n", 100.0, c2f(100.0));

Answer 2

package gradedhomeworkproject; 公共类GradedHomeworkProject {

public static double f2c(double fahrenheit)
{
    return 5.0 / 9.0 * (fahrenheit - 32.0);
}

public static double c2f(double celsius)
{
    return 9.0 / 5.0 * celsius + 32.0;
}
public static double k2c(double kelvin)
{        
    return 5.0 / 9.0 * kelvin;
}    
public static double c2k(double celsiusx)
{
    return (9.0 / 5.0 - 273.15) - 1.8; 
}  

public static void main(String[] args)
{
    System.out.printf("%.2f F => %.2f C%n", 32.0, f2c(32.0));
    System.out.printf("%.2f F => %.2f C%n", 212.0, f2c(212.0));
    System.out.printf("%.2f C => %.2f F%n", 0.0, c2f(0.0));
    System.out.printf("%.2f C => %.2f F%n", 100.0, c2f(100.0));
    System.out.printf("%.2f K => %.2f C%n", 273.16, k2c(0.0));
    System.out.printf("%.2f C => %.2f K%n", 0.0, c2k(-273.16));
}

} ＆＃34;这就是我现在所拥有的。＆＃34;

Answer 3

包morejava; 公共类MoreJava {     public static double f2c（double fahrenheit）

{
    return 5.0 / 9.0 * (fahrenheit - 32.0);
}

public static double c2f(double celsius)
{
    return 9.0 / 5.0 * celsius + 32.0;
}
public static double c2k(double celsiusX)
{        
    return celsiusX + 273.15;
}
public static double k2c(double kelvin)
{
    return kelvin - 273.15;
}  
public static double f2k(double fahrenheitX)
{        
    return (fahrenheitX + 459.67) * 5.0 / 9.0;
}      
public static double k2f(double kelvin)
{        
    return kelvin * 9.0 / 5.0 - 459.67;
}       
public static void main(String[] args)
{
    System.out.printf("%.2f F => %.2f C%n", 32.0, f2c(32.0));
    System.out.printf("%.2f F => %.2f C%n", 212.0, f2c(212.0));
    System.out.printf("%.2f C => %.2f F%n", 0.0, c2f(0.0));
    System.out.printf("%.2f C => %.2f F%n", 100.0, c2f(100.0));
    System.out.printf("%.2f C => %.2f K%n", 0.0, c2k(0.0));
    System.out.printf("%.2f C => %.2f K%n", 100.0, c2k(100.0));
    System.out.printf("%.2f K => %.2f C%n", 273.15, k2c(273.15));
    System.out.printf("%.2f K => %.2f C%n", 373.15, k2c(373.15));
    System.out.printf("%.2f F => %.2f K%n", 32.0, f2k(32.0));
    System.out.printf("%.2f F => %.2f K%n", 212.0, f2k(212.0));
    System.out.printf("%.2f K => %.2f F%n", 273.15, k2f(273.15));
    System.out.printf("%.2f K => %.2f F%n", 373.15, k2f(373.15));
}

}
我很自豪地说我弄清楚了！

Answer 4

您必须关闭方法public static double k2c(double kelvin)

在返回后添加}和半冒号...

最终代码：

package projectTwo;
public class projectTwo {

    public static double f2c(double fahrenheit)
    {
        return 5.0 / 9.0 * (fahrenheit - 32.0);
    }

    public static double c2f(double celsius)
    {
        return 9.0 / 5.0 * celsius + 32.0;
    }
    public static double k2c(double kelvin)
    {        
        return 5.0 / 9.0;
    }
    public static void main(String[] args)
    {
        System.out.printf("%.2f F => %.2f C%n", 32.0, f2c(32.0));
        System.out.printf("%.2f F => %.2f C%n", 212.0, f2c(212.0));
        System.out.printf("%.2f C => %.2f F%n", 0.0, c2f(0.0));
        System.out.printf("%.2f C => %.2f F%n", 100.0, c2f(100.0));
    }

}

输出