std::isalpha

 

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Funções Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Manipulação personagem Original: Character manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
isalnum isalpha islower isupper isdigit isxdigit isblank (C++11)	iscntrl isgraph isspace isprint ispunct tolower toupper
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Diversos Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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Definido no cabeçalho <cctype>
int isalpha(int ch );

Verifica se o caráter dado é um caractere alfabético de acordo com a localidade C instalado atualmente. Na localidade padrão, esta função retorna true para as letras e ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.

Original:

Checks if the given character is an alphabetic character according to the currently installed C locale. In the default locale, this function returns true for the letters ABCDEFGHIJKLMNOPQRSTUVWXYZ and abcdefghijklmnopqrstuvwxyz.

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Parâmetros

ch

-

personagem Original: character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valor de retorno

Valor diferente de zero (true) se o personagem é um caractere alfabético, 0 (false) de outra forma.

Original:

Non-zero value (true) if the character is an alphabetic character, 0 (false) otherwise.

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Exemplo

#include <iostream>#include <cctype> #include <clocale>   int main(){char c ='\xdf';// German letter ß in ISO-8859-1   std::cout<<"isalpha(\'\\xdf\', default C locale) returned "<<std::boolalpha<<(bool)std::isalpha(c)<<'\n';   std::setlocale(LC_ALL, "de_DE.iso88591");std::cout<<"isalpha(\'\\xdf\', ISO-8859-1 locale) returned "<<std::boolalpha<<(bool)std::isalpha(c)<<'\n';   }

Saída:

isalpha('\xdf', default C locale) returned false isalpha('\xdf', ISO-8859-1 locale) returned true

Veja também

isalpha(std::locale)	checa se o caractere é classificado como alfabético pela localização Original: checks if a character is classified as alphabetic by a locale The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função)
iswalpha	verifica se um caractere largo é alfabética Original: checks if a wide character is alphabetic The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função)
Documentação C para isalpha

ASCII values (hex)		characters	iscntrl iswcntrl	isprint iswprint	isspace iswspace	isblank iswblank	isgraph iswgraph	ispunct iswpunct	isalnum iswalnum	isalpha iswalpha	isupper iswupper	islower iswlower	isdigit iswdigit	isxdigit iswxdigit
0 - 8	0x00-0x08	control codes (NUL, etc.)	≠0	0	0	0	0	0	0	0	0	0	0	0
9	0x09	tab (\t)	≠0	0	≠0	≠0	0	0	0	0	0	0	0	0
10 - 13	0x0A-0x0D	whitespaces (\n,\v,\f,\r)	≠0	0	≠0	0	0	0	0	0	0	0	0	0
14 - 31	0x0E-0x1F	control codes	≠0	0	0	0	0	0	0	0	0	0	0	0
32	0x20	space	0	≠0	≠0	≠0	0	0	0	0	0	0	0	0
33 - 47	0x21-0x2F	!"#$%&'()*+,-./	0	≠0	0	0	≠0	≠0	0	0	0	0	0	0
48 - 57	0x30-0x39	0123456789	0	≠0	0	0	≠0	0	≠0	0	0	0	≠0	≠0
58 - 64	0x3a-0x40	:;<=>?@	0	≠0	0	0	≠0	≠0	0	0	0	0	0	0
65 - 70	0x41-0x46	ABCDEF	0	≠0	0	0	≠0	0	≠0	≠0	≠0	0	0	≠0
71 - 90	0x47-0x5A	GHIJKLMNOPQRSTUVWXYZ	0	≠0	0	0	≠0	0	≠0	≠0	≠0	0	0	0
91 - 96	0x5B-0x60	[\]^_`	0	≠0	0	0	≠0	≠0	0	0	0	0	0	0
97 -102	0x61-0x66	abcdef	0	≠0	0	0	≠0	0	≠0	≠0	0	≠0	0	≠0
103-122	0x67-0x7A	ghijklmnopqrstuvwxyz	0	≠0	0	0	≠0	0	≠0	≠0	0	≠0	0	0
123-126	0x7B-0x7E	{|}~	0	≠0	0	0	≠0	≠0	0	0	0	0	0	0
127	0x7F	backspace character (DEL)	≠0	0	0	0	0	0	0	0	0	0	0	0