std::memset

 

C++

Lenguaje

Cabeceras

Conceptos

Biblioteca de utilidades

Biblioteca de cadenas

Biblioteca de contenedores

Biblioteca de algoritmos

Biblioteca de iteradores

Biblioteca numérica

Biblioteca de entrada/salida

Biblioteca de localización

Biblioteca de expresiones regulares (C++11)

Biblioteca de operaciones atómicas (C++11)

Biblioteca de tareas/subprocesos (C++11)

 

Strings biblioteca

Terminadas en nulo 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.

Cadenas de bytes

Multibyte cuerdas

Cadenas anchas

Clases 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

 

Terminadas en nulo de bytes

Funciones Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
De manipulación de caracteres 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
Las conversiones a formatos numéricos 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
Cadena de manipulación 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
Cadena examen 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
Memoria manipulación 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
Varios 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

 

Defined in header <cstring>
void* memset( void* dest, int ch, std::size_t count );

Convierte el valor a ch unsigned char y lo copia en cada uno de los personajes count primera del objeto apuntado por dest. Si el objeto no es trivial-copiable (por ejemplo, escalar, matriz o una estructura C-compatible), el comportamiento no está definido. Si count es mayor que el tamaño del objeto apuntado por dest, el comportamiento es indefinido .

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.

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

Parámetros

dest	-	puntero al objeto de llenar 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	-	llenar byte 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	-	número de bytes que llenar 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.

Valor de retorno

dest

Ejemplo

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

Output:

a[0] = 0

Ver también

memcpy	copia un tampón a otro 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. (función)
fill_n	asigna un valor a una serie de elementos 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. (función de plantilla)
is_trivially_copyable (C++11)	checks if a type is trivially copyable (clase de plantilla)
C documentation for memset