打印共享內存地址值到命令行

我正在嘗試使用boost的共享內存庫來執行一些進程間通信（VS 2015）。我發現一個example online這是非常有幫助的。爲了理智，我只想執行一個簡單的檢查，即我寫入共享內存地址的值是我想要的值。爲此，我想用cout打印共享內存的值。這是代碼我目前：打印共享內存地址值到命令行

#include <boost\interprocess\shared_memory_object.hpp> 
#include <boost\interprocess\mapped_region.hpp> 
#include <iostream> 
#include <stdio.h> 
#include <conio.h> 
#include <cstring> 
#include <cstdlib> 
#include <string> 

int main() 
{ 
    using namespace boost::interprocess; 

    struct shm_remove 
    { 
     shm_remove() { shared_memory_object::remove("MySharedMemory"); } 
     ~shm_remove() { shared_memory_object::remove("MySharedMemory"); } 
    } remover; 

    //Create a shared memory object 
    shared_memory_object shm(create_only, "MySharedMemory", read_write); 

    //Set size to 1 
    shm.truncate(1); 

    //Map the whole shared memory in this process 
    mapped_region region(shm, read_write); 

    //Write all the memory to 1 
    std::memset(region.get_address(), 1, region.get_size()); 

    //Check that memory was initialized to 1 
    char *mem = static_cast<char*>(region.get_address()); 

    for (std::size_t i = 0; i < region.get_size(); ++i) 
    { 
     std::cout << "Memory value: " << *mem << "\n"; 
     if (*mem++ != 1) 
     { 
      return 1; //Error checking memory 
     } 
    } 
    std::cout << "press any key to quit"; 
    _getch(); 
}

的代碼工作正常，當檢查該映射的內存已被設置爲1。然而，當我嘗試打印什麼，我認爲應該是值沒有錯誤拋出在地址，我得到一個笑臉......