std::memset — cppreference.com

De cppreference.com

Déclaré dans l'en-tête `<cstring>`
`void* memset( void* dest, int ch, std::size_t count );`

Convertit la valeur de ch unsigned char et le copie dans chacun des personnages count première de l'objet pointé par dest. Si l'objet n'est pas trivialement-copiable (par exemple, un scalaire, un tableau ou une structure C-compatible), le comportement est indéfini. Si count est supérieure à la taille de l'objet pointé par dest, le comportement n'est pas défini .

Original:

Converts the value ch to unsigned char and copies it into each of the first count characters of the object pointed to by dest. If the object is not trivially-copyable (e.g., scalar, array, or a C-compatible struct), the behavior is undefined. If count is greater than the size of the object pointed to by dest, the behavior is undefined.

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Paramètres

dest	-	pointeur vers l'objet à remplir Original: pointer to the object to fill The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ch	-	remplir octet Original: fill byte 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 remplir Original: number of bytes to fill 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

dest

Exemple

#include <iostream>
#include <cstring>

int main()
{
    int a[20];
    std::memset(a, 0, sizeof(a));
    std::cout << "a[0] = " << a[0] << '\n';
}

Résultat :

Voir aussi


memcpy	une copie du tampon à l'autre Original: copies one buffer to another The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) [edit]

fill_n	assigne une valeur à un nombre d'éléments Original: assigns a value to a number of elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) [edit]

is_trivially_copyable (C++11)	checks if a type is trivially copyable (classe générique) [edit]

C documentation for memset