注册 Codewars - Java 练习
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Signing up Codewars - Java Exercise
提问by R Jani
The code is
代码是
public class Multiply
{
public static Double multiply(Double a, Double b)
{
return a * b
}
}
I cannot solve the above code.
I tried a few things, like
我无法解决上面的代码。
我尝试了一些东西，比如
public class Multiply
{
public double multiply(double a, double b)
{ return a * b;}
}
It still shows errors in code.
Kindly help, please.
它仍然显示代码中的错误。
请帮助，请。
回答by nathantspencer
You essentially had the answer Codewars wanted. I imagine they expected for you to just add the semicolon, as you did, but keep the rest of the code the same.
您基本上得到了 Codewars 想要的答案。我想他们希望您像您一样只添加分号，但保持其余代码相同。
public class Multiply
{
public static Double multiply(Double a, Double b)
{
return a * b;
}
}
I went to try it out, and this worked for me. Looks like they wanted you to keep staticand the wrapper class Double.
我去试试，这对我有用。看起来他们希望你保留static包装类Double。
回答by nathantspencer
Here is the answer:
这是答案：
public class Multiply
{
public double multiply(double a, double b)
{ return a * b;}
}
回答by Helper
Think about how it will work if it is executed without any mainmethod and what all things are missing / incorrect format in the code
想想如果它在没有任何main方法的情况下执行，它将如何工作以及代码中缺少什么/格式不正确
E.g. Where you can add any double value
例如，您可以在哪里添加任何双值
public class Multiply {
public static double multiply(double a, double b) {
return a * b;
}
public static void main(String[] args) {
double result = multiply(20.01, 10.10);
System.out.println("The result is: " + result);
}
}
