为什么 Decimal.Divide(int, int) 有效，但 (int/int) 无效?

问题描述

为什么将两个 32 位 int 数除为 (int/int) 返回给我 0，但如果我使用 Decimal.Divide() 我得到正确答案?我绝不是 C# 人.

How come dividing two 32 bit int numbers as ( int / int ) returns to me 0, but if I use Decimal.Divide() I get the correct answer? I'm by no means a c# guy.

推荐答案

int是整数类型；将两个整数相除执行 integer 除法，即小数部分被截断，因为它不能存储在结果类型中(也是 int！).相比之下，Decimal 有一个小数部分.通过调用 Decimal.Divide，您的 int 参数会隐式转换为 Decimals.

int is an integer type; dividing two ints performs an integer division, i.e. the fractional part is truncated since it can't be stored in the result type (also int!). Decimal, by contrast, has got a fractional part. By invoking Decimal.Divide, your int arguments get implicitly converted to Decimals.

您可以通过将至少一个参数显式转换为浮点类型来强制对 int 参数进行非整数除法，例如:

You can enforce non-integer division on int arguments by explicitly casting at least one of the arguments to a floating-point type, e.g.:

int a = 42;
int b = 23;
double result = (double)a / b;

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