isupper, iswupper, _ismbcupper
Remonter à Ctype.h - Index
Header File
ctype.h, wctype.h, mbstring.h
Category
Classification Routines
Prototype
int isupper(int c);
int iswupper(wint_t c);
int _ismbcupper(unsigned int c);
Description
Tests for uppercase character.
isupper is a macro that classifies ASCII-coded integer values by table lookup. The macro is affected by the current locale’s LC_CTYPE category. For the default C locale, c is an uppercase letter (A to Z).
You can make this macro available as a function by undefining (#undef) it.
Return Value
isupper returns nonzero if c is an uppercase letter.
Example
#include <stdio.h>
#include <ctype.h>
int main(void)
{
char c = 'C';
if (isupper(c))
printf("%c is an uppercase character\n",c);
else
printf("%c is not an uppercase character\n",c);
return 0;
}
Portability
POSIX | Win32 | ANSI C | ANSI C++ | |
---|---|---|---|---|
isupper |
+ |
+ |
+ |
+ |
_ismbcupper |
+ |
|||
iswupper |
+ |
+ |
+ |