C语言中有bool类型吗？

zouhu_cn

C语言中有bool类型吗？
为什么在aix下，定义bool型 编译可以通过并可以使用？
如：
bool ok;
static void Mm(bool *a, const bool *b, int len);

zouhu_cn

搜了一下，说头系统文件里定义了
#include   <stdbool.h>  

不明白什么意思？

cugb_cat

c99提供

prolj

AIX那个xlc支持C99不？

baopbird2005

c好像没有吧

shuchi91

o,1不就可以代表bool吗？
最多再来个宏定义吧

felixzxh

C99

Boolean type
Note that, although _Bool is technically an integer type, conversion to _Bool does not always
work the same as conversion to other integer types. Consider, for example, that the expression
(_Bool)0.5 evaluates to 1, whereas (int)0.5 evaluates to 0. The first result is correct: it
simply says that 0.5 is non-zero; but it may be somewhat counter-intuitive unless a _Bool is
thought of as a “truth value” rather than as a one-bit integer.

zouhu_cn

用的是cc编译器。