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std::isgraph - cppreference.com

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<metanoindex/>

<tbody> </tbody>

Elemento definito nell'header

<cctype>

int isgraph( int ch );

Controlla se il personaggio ha dato una rappresentazione grafica, i. e. o è un numero (0123456789), una lettera maiuscola (ABCDEFGHIJKLMNOPQRSTUVWXYZ), una lettera minuscola (abcdefghijklmnopqrstuvwxyz), o un carattere di punteggiatura (!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~), o qualsiasi altro carattere grafico specifico per la localizzazione corrente C.

Original:

Checks if the given character has a graphical representation, i. e. it is either a number (0123456789), an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ), a lowercase letter (abcdefghijklmnopqrstuvwxyz), or a punctuation character(!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~), or any graphical character specific to the current C locale.

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Parametri

ch -

carattere

Original:

character

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Valore di ritorno

Valore diverso da zero (true) se il personaggio ha un carattere rappresentazione grafica, 0 (false) altrimenti.

Original:

Non-zero value (true) if the character has a graphical representation character, 0 (false) otherwise.

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Esempio

#include <iostream>
#include <cctype>
#include <clocale>

int main()
{
    char c = '\xb6'; // the character ¶ in ISO-8859-1

    std::cout << "isgraph(\'\\xb6\', default C locale) returned "
               << std::boolalpha << (bool)std::isgraph(c) << '\n';

    std::setlocale(LC_ALL, "en_GB.iso88591");
    std::cout << "isgraph(\'\\xb6\', ISO-8859-1 locale) returned "
              << std::boolalpha << (bool)std::isgraph(c) << '\n';
}

Output: 

isgraph('\xb6', default C locale) returned false
isgraph('\xb6', ISO-8859-1 locale) returned true

Vedi anche

Verifica se un personaggio è classfied come grafica da un locale

Original:

checks if a character is classfied as graphical by a locale

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(funzione di modello) [modifica]

Verifica se un carattere esteso è un carattere grafico

Original:

checks if a wide character is a graphical character

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(funzione) [modifica]

C documentation for isgraph

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