C ++-将指针存储在字节数组中？

Question

有什么方法可以将指针地址逐字节存储在char字节数组中，然后再将其转换回指针？

Answer 1

Sure. Just memcpy it:

void* ptr = nullptr;
char buffer[sizeof(void*)];
memcpy(buffer, &ptr, sizeof(void*));

And back:

memcpy(&ptr, buffer, sizeof(void*));

Answer 2

Yes, you can do:

void *p = bla;

char temp[sizeof p];
std::memcpy(temp, &p, sizeof p);
// ...
std::memcpy(&p, temp, sizeof p);

You may need #include <cstring> for memcpy .