std::memcpy
From cppreference.com
Defined in header <cstring>
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void* memcpy( void* dest, const void* src, std::size_t count ); |
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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.
Contents |
[edit] Parameters
dest | - | pointer to the memory location to copy to |
src | - | pointer to the memory location to copy from |
count | - | number of bytes to copy |
[edit] Return value
dest
[edit] Example
#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
[edit] See also
moves one buffer to another (function) | |
(C++11) |
copies a range of elements to a new location (function template) |
copies a range of elements in backwards order (function template) | |
(C++11) |
checks if a type is trivially copyable (class template) |
C documentation for memcpy
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