代码如下:
class testsum
{
public static void main(String arg[])
{
double sum=0;
double fraction;
fraction=-1/9;
System.out.println("fraction: "+fraction);
fraction=-1;
fraction=fraction/9;
System.out.println("fraction: "+fraction);
}
}
输出是 0
然后是 -0.11111111
为什么第一个输出是 0
而不是 -0.11111111111
?
why was the first output 0
and not -0.11111111111
?
它在第一个示例中进行整数除法,因为这是数字文字的默认类型.尝试将其更改为 -1.0/9
(或 1d/9d
- d 后缀表示 double
),您应该会得到相同的答案.
It's doing integer division in the first example as this is the default type for a numeric literal. Try changing it to -1.0/9
(or 1d/9d
- the d suffix indicates a double
) and you should get the same answer.
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