Namespace
Varianti

std::memcpy

Da cppreference.com.
< cpp‎ | string‎ | byte

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C++
 
Stringhe libreria
Null-stringhe terminate
Original:
Null-terminated strings
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Byte stringhe
Multibyte stringhe
Stringhe larghe
Classi
Original:
Classes
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basic_string
char_traits
 
Null-stringhe terminate byte
Funzioni
Original:
Functions
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Carattere manipolazione
Original:
Character manipulation
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Le conversioni in formati numerici
Original:
Conversions to numeric formats
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Della gestione delle stringhe
Original:
String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
String esame
Original:
String examination
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Memoria manipolazione
Original:
Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
Varie
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Miscellaneous
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strerror
 
Elemento definito nell'header <cstring>
void* memcpy( void* dest, const void* src, std::size_t count );

Copies count bytes from the object pointed to by src to the object pointed to by dest.

If the objects overlap, the behavior is undefined. If the objects are not trivially copyable (e.g. scalars, arrays, C-compatible structs), the behavior is undefined.

Indice

[modifica] Parametri

dest -
puntatore alla locazione di memoria in cui copiare
Original:
pointer to the memory location to copy to
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src -
puntatore alla locazione di memoria da cui copiare
Original:
pointer to the memory location to copy from
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count -
numero di byte da copiare
Original:
number of bytes to copy
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[modifica] Valore di ritorno

dest

[modifica] Esempio

#include <iostream>
#include <cstring>
 
int main()
{
    char source[] = "once upon a midnight dreary...";
    char dest[4];
    std::memcpy(dest, source, sizeof dest);
    for (char c : dest) {
        std::cout << c << '\n';
    }
}

Output: 

o
n
c
e

[modifica] Vedi anche
sposta un buffer all'altro
Original:
moves one buffer to another
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(funzione) [modifica]

(C++11)
copia un intervallo di elementi in una nuova posizione
Original:
copies a range of elements to a new location
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(funzione di modello) [modifica]
una serie di elementi in ordine inverso
Original:
copies a range of elements in backwards order
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(funzione di modello) [modifica]
(C++11)
 checks if a type is trivially copyable
(classe template) [modifica]
C documentation for memcpy
Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/string/byte/memcpy&oldid=26751"