No, _Bool is a distinct type, introduced by the 1999 edition of the standard.

No, marcosdumay wrote 'typedef bool int', by which he/she probably meant 'typedef int bool', which was not so uncommon when there was no native bool type in C, since the former would be illegal since the standard forbids typedefing already existent types such as int. strkitten informed about the probable typo.

Sorry, I managed to miss the context.