std::memcpy - cppreference.com

De cppreference.com

Definido no cabeçalho `<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.

Parâmetros

dest	-	ponteiro para o local de memória para copiar Original: pointer to the memory location to copy to The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
src	-	ponteiro para o local de memória para copiar Original: pointer to the memory location to copy from 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 a serem copiados Original: number of bytes to copy 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

Exemplo

#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';
    }
}

Saída:

Veja também


memmove	move-se um tampão para o outro Original: moves 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. (função) [edit]

copy copy_if (C++11)	Copia um intervalo de elementos para um novo local Original: copies a range of elements to a new location The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) [edit]

copy_backward	cópias. uma série de elementos a fim de trás Original: copies a range of elements in backwards order The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função) [edit]

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

Documentação C para memcpy