std::islower
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<tbody> </tbody>| Dclar dans l'en-tte <cctype>
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int islower( int ch ); |
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Vrifie si le caractre donn est class comme un caractre en minuscule en fonction de la localisation en cours C. Dans la valeur par dfaut "C",
islower retourne true uniquement pour les lettres minuscules (abcdefghijklmnopqrstuvwxyz) .Original:
Checks if the given character is classified as a lowercase character according to the current C locale. In the default "C" locale,
islower returns true only for the lowercase letters (abcdefghijklmnopqrstuvwxyz).The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Si
islower retours true, il est garanti que iscntrl, isdigit, ispunct et isspace retour false de la mme nature dans la mme zone C .Original:
If
islower returns true, it is guaranteed that iscntrl, isdigit, ispunct, and isspace return false for the same character in the same C locale.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Paramtres
| ch | - | caractre
Original: character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Retourne la valeur
Valeur non nulle (
true) si le caractre est une lettre minuscule, 0 (false) autrement .Original:
Non-zero value (
true) if the character is a lowercase letter, 0 (false) otherwise.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Exemple
#include <iostream>
#include <cctype>
#include <clocale>
int main()
{
char c = '\xe5'; // letter in ISO-8859-1
std::cout << "islower(\'\\xe5\', default C locale) returned "
<< std::boolalpha << (bool)std::islower(c) << '\n';
std::setlocale(LC_ALL, "en_GB.iso88591");
std::cout << "islower(\'\\xe5\', ISO-8859-1 locale) returned "
<< std::boolalpha << (bool)std::islower(c) << '\n';
}
Rsultat :
islower('\xe5', default C locale) returned false
islower('\xe5', ISO-8859-1 locale) returned true
Voir aussi
vrifie si un caractre est considr comme minuscules par un paramtre rgional Original: checks if a character is classified as lowercase 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. (fonction gnrique) | |
vrifie si un caractre large est en minuscules Original: checks if a wide character is lowercase The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) | |
C documentation for islower
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| ASCII values (hex) |
characters | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
|