在Java中使用双精度类型进行除法时出错

本文介绍了在Java中使用双精度类型进行除法时出错的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

好的。我一直在脑海里猛击了大约2个小时，试图弄清为什么世界上 double answer = 364/365; 告诉我 answer 为0。或者 double 的任何其他组合，它只是截断了小数，我只是不知道为什么。

Okay. I have been bashing my head against the wall for like 2 hours now trying to figure out why in the world double answer = 364/365; is telling me that answer is 0. Or any other combination of double for that matter, its just truncating the decimal and I just don't know why.

推荐答案

364/365执行整数除法（截断小数点）。

364/365 performs integer division (truncates the decimal).

尝试双重答案= 364.0 / 365; 强制其执行浮点除法。

Try double answer = 364.0/365; to force it to perform floating point division.

类似于：

double days_in_year = 365; double answer = 364/days_in_year;

也可以工作，因为其中一个操作数不是整数。

would work as well, since one of the operands isn't an integer.