ç整数除法和地板 [英] C integer division and floor

问题描述

在C，是在它们之间的整数除法的a / b和地板（A / B），其中a和b是整数的差？
这两个过程中更具体地说，会发生什么？

In C, is there a difference between integer division a/b and floor(a/b) where both a and b are integers? More specifically what happens during both processes?

推荐答案

A / B 确实整数除法。如果 A 或 B 为负时，结果取决于编译器（四舍五入可以去朝零或向负无穷大在pre-C99，C99的+，舍入云朝0）。结果类型 INT 。 楼（A / B）做同样的划分，将结果转换为加倍，丢弃（不存在）的小数部分，并返回结果为double。

a/b does integer division. If either a or b is negative, the result depends on the compiler (rounding can go toward zero or toward negative infinity in pre-C99; in C99+, the rounding goes toward 0). The result has type int. floor(a/b) does the same division, converts the result to double, discards the (nonexistent) fractional part, and returns the result as a double.

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