C++ 不同整数类型的区别
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Difference between different integer types
提问by user1507133
I was wondering what is the difference between uint32_tand uint32, and when I looked in the header files it had this:
我想知道uint32_tand之间有什么区别uint32，当我查看头文件时，它有这个：
types.h:
/** @brief 32-bit unsigned integer. */
typedef unsigned int uint32;
stdint.h:
typedef unsigned uint32_t;
This only leads to more questions: What is the difference between
这只会引出更多问题：两者之间有什么区别？
unsigned varName;
and
和
unsigned int varName;
?
?
I am using MinGW.
我在用 MinGW.
采纳答案by Kerrek SB
unsignedand unsigned intare synonymous, much like unsigned short [int]and unsigned long [int].
unsignedandunsigned int是同义词，很像unsigned short [int]and unsigned long [int]。
uint32_tis a type that's (optionally) defined by the C standard. uint32is just a name you made up, although it happens to be defined as the same thing.
uint32_t是由 C 标准（可选）定义的类型。uint32只是你编造的一个名字，尽管它恰好被定义为同一个东西。
回答by RiaD
There is no difference.
没有区别。
unsigned int = uint32 = uint32_t = unsignedin your case and unsigned int = unsignedalways
unsigned int = uint32 = uint32_t = unsigned在你的情况下，unsigned int = unsigned总是
回答by Mat
There is absolutely no difference between unsignedand unsigned int.
unsigned和之间绝对没有区别unsigned int。
Whether that type is a good match for uint32_tis implementation-dependant though; an intcould be "shorter" than 32 bits.
不过，该类型是否适合匹配uint32_t取决于实现；anint可能比 32 位“短”。
回答by Russell Borogove
unsignedand unsigned intare synonymous for historical reasons; they both mean "unsigned integer of the most natural size for the CPU architecture/platform", which is often (but by no means always) 32 bits on modern platforms.
unsigned并且unsigned int由于历史原因是同义词；它们都表示“CPU 架构/平台最自然大小的无符号整数”，在现代平台上通常（但绝不总是）32 位。
<stdint.h>is a standard header in C99 that is supposed to give type definitions for integers of particular sizes, with the uint32_tnaming convention.
<stdint.h>是 C99 中的标准头文件，它应该为具有uint32_t命名约定的特定大小的整数提供类型定义。
The <types.h>that you're looking at appears to be non-standard and presumably belongs to some framework your project is using. Its uint32typedef is compatible with uint32_t. Whether you should use one or the other in your code is a question for your manager.
该<types.h>说你看似乎是不规范的，想必是属于一些框架您的项目使用。它的uint32typedef 与uint32_t. 您是否应该在代码中使用其中一种是您的经理的问题。
