在C ++中从int获取byte []

Question

So in my C++ program I am trying to replicate the C# BitConverter.GetBytes() function, or at least find some method in which it will return same result, (btw I cannot use std::vector<unsigned char> which I've seen a few people recommend on other forums).

I'm using this so I can take an int and then get a byte[] of it then take that byte[] and use it to set memory at a particular memory address. I've also tried

int x;
static_cast<char*>(static_cast<void*>(&x));

with no luck. Any suggestions are appreciated!

Answer 1

#include <string>

int i = 123;
char c[sizeof(int)];
std::memcpy(c,&i,sizeof(int));

Answer 2

Another method would be

union Value
{
   int val;
   char bytearray[sizeof(int)];
};

which does not use memcpy.Instead it allows a value in memory as different types