c++ - 包含值地址的字符串 -> 该值的指针

Question

所以我有一个字符串，其中包含另一个变量的地址，我想将该地址转换为实际指针，以便我可以编辑该地址处的值。

所以，我基本上想做相反的事情。

int value = 10;
auto address = reinterpret_cast<uintptr_t>(&value);
std::stringstream ss;
ss << std::hex << address;
std::string strAddr (ss.str());
std::cout << "Address of value = " << strAddr << std::endl; // just append "0x" to start if you want to format it like hex

Answer 1

逆过程:

const std::string address_as_text = "0x12345678";
unsigned int address_as_number = 0U;
std::istringstream addr_stream(address_as_text);
addr_stream >> hex >> address_as_number;
int * pointer_to_int = (int *) address_as_number;
int value_from_memory = *pointer_to_int;