BOOL和bool有什么区别? [英] What is the difference between BOOL and bool?

问题描述

在VC ++中，我们的数据类型"BOOL"可以假定值为TRUE或FALSE，而我们的数据类型"bool"可以假定值为True或false.

In VC++ we have the data type "BOOL" which can assume the value TRUE or FALSE, and we have the data type "bool", which can assume the value true or false.

它们之间有什么区别，何时应使用每种数据类型?

What is the difference between them and when should each data type be used?

推荐答案

bool是内置的C ++类型，而BOOL是定义为int的Microsoft特定类型.您可以在windef.h中找到它:

bool is a built-in C++ type while BOOL is a Microsoft specific type that is defined as an int. You can find it in windef.h:

typedef int                 BOOL;

#ifndef FALSE
#define FALSE               0
#endif

#ifndef TRUE
#define TRUE                1
#endif

bool的值是true和false，而对于BOOL，您可以使用任何int值，尽管TRUE和FALSE宏在windef.h标头中定义

The values for a bool are true and false, whereas for BOOL you can use any int value, though TRUE and FALSE macros are defined in the windef.h header.

这意味着sizeof运算符将为bool产生1(尽管标准状态是bool的大小由实现定义)，而对于BOOL则产生4.

This means that the sizeof operator will yield 1 for bool (the standard states, though, that the size of bool is implementation defined), and 4 for BOOL.

来源: Codeguru文章

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