c++ - 首选包含 std::size_t 的 header

Question

std::size_t在以下任何一个中定义:
<cstddef> <cstdio> <cstdlib> <cstring> <ctime> <cwchar>

因为只得到 std::size_t 而被认为是“犹太洁食” ？

Answer 1

因为这是 C 库的一部分，我认为 C 标准指定的 header 是正确的:stddef.h ，即 cstddef .

来自 C11:

7.19 Common definitions

The header defines the following macros and declares the following types. Some are also defined in other headers, as noted in their respective subclauses.

[...] size_t which is the unsigned integer type of the result of the sizeof operator;

这毕竟是一个 C++ 问题，所以我认为引用 C++ 标准更合适:

18.2 Types

Table 30 describes the header <cstddef>.

Types: ptrdiff_t size_t max_align_t nullptr_t