_toupper - transliterate lower-case characters to upper-case
#include <ctype.h>
The _toupper() macro is equivalent to toupper(3C) except that the argument c must be a lower-case letter.
On successful completion, _toupper() returns the upper-case letter corresponding to the argument passed.
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE | ATTRIBUTE VALUE |
CSI | Enabled |
Interface Stability | Standard |
MT-Level | MT-Safe |
islower(3C), toupper(3C), attributes(5), standards(5)
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Created 1996-2024 by Maxim Chirkov Добавить, Поддержать, Вебмастеру |