C ++ - 获取特定内存地址的值 [英] C++ - Get value of a particular memory address

问题描述

我想知道是否可以这样做：

I was wondering whether it is possible to do something like this:

unsigned int address = 0x0001FBDC; // Random address :P
int value = *address; // Dereference of address

意思是，可以获得内存中特定地址的值吗？

Meaning, is it possible to get the value of a particular address in memory ?

感谢

推荐答案

#include <cstdint>

uintptr_t p = 0x0001FBDC;
int value = *reinterpret_cast<int *>(p);

请注意，除非有一些保证 p 指向一个整数，这是未定义的行为。如果您尝试访问不希望您访问的地址，标准操作系统将会终止您的进程。但是，这可能是独立程序中的常见模式。

Note that unless there is some guarantee that p points to an integer, this is undefined behaviour. A standard operating system will kill your process if you try to access an address that it didn't expect you to address. However, this may be a common pattern in free-standing programs.

（早期版本的C ++应该说 #include< stdint.h> 和 intptr_t 。）

(Earlier versions of C++ should say #include <stdint.h> and intptr_t.)

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