std::memcmp

 

C++

Langage

Concepts

Bibliothèque d'utilitaires

Bibliothèque pour les chaînes de caractères

Bibliothèque de conteneurs

Bibliothèque d'algorithmes

Bibliothèque d'itérateurs

Bibliothèque pour le calcul numérique

Bibliothèque pour les entrées/sorties

Bibliothèque pour la régionalisation

Bibliothèque pour les expressions régulières (C++11)

Bibliothèque pour les opérations atomiques (C++11)

Bibliothèque pour les processus légers (threads) (C++11)

 

Bibliothèque de chaînes de caractères

Chaînes à zéro terminal Original: Null-terminated strings The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Les chaînes d'octets

Chaines multi-octets

Les chaînes étendues

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

basic_string

char_traits

 

Chaînes d'octets à zéro terminal

Fonctions Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Manipulation caractère 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
Conversion aux formats numériques Original: Conversions to numeric formats The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
atof atoi atol atoll strtol strtoll	strtoul strtoull strtof strtod strtold
La manipulation de chaînes Original: String manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strcpy
strncpy
strcat
strncat
strxfrm
Examen chaîne Original: String examination The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strlen strcmp strncmp strcoll strchr strrchr	strspn strcspn strpbrk strstr strtok
Manipulation de la mémoire Original: Memory manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
memchr
memcmp
memset
memcpy
memmove
Divers Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strerror

 

Déclaré dans l'en-tête <cstring>
int memcmp( const void* lhs, const void* rhs, std::size_t count );

Compare les caractères count premiers objets pointés par lhs et rhs. La comparaison est faite lexicographique .

Original:

Compares the first count characters of the objects pointed to by lhs and rhs. The comparison is done lexicographically.

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Paramètres

lhs, rhs	-	des pointeurs vers la mémoire tampon pour comparer Original: pointers to the memory buffers to compare The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
count	-	nombre d'octets à examiner Original: number of bytes to examine 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 négative si lhs est moins rhs .

Original:

Negative value if lhs is less than rhs.

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​0​ si lhs est égal à' rhs .

Original:

​0​ if lhs is equal to rhs.

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Valeur positive si lhs est supérieure à' rhs .

Original:

Positive value if lhs is greater than rhs.

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Voir aussi

strcmp	compare deux chaînes Original: compares two strings The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction)
strncmp	compare un certain nombre de caractères de deux chaînes Original: compares a certain amount of characters of two strings 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 memcmp