25.文件当做内存来操作

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <boost/interprocess/file_mapping.hpp>
#include <boost/interprocess/mapped_region.hpp>
#include <fstream>
#include <cassert>
#include <cstdlib>

using namespace std;
using namespace boost;

//#pragma comment(lib,"libboost_date_time-vc141-mt-sgd-x32-1_66.lib")

void main()
{
    //创建读写模式
    boost::interprocess::mode_t mode = boost::interprocess::read_write;
    char path[50] = "1.txt";
    //文件映射
    boost::interprocess::file_mapping fm(path, mode);
    //用region访问
    boost::interprocess::mapped_region region(fm, mode, 0, 0);

    char *pbegin = reinterpret_cast<char *>(region.get_address());
    char *pend = pbegin + region.get_size();
    for (char *p = pbegin; p != pend; p++)
    {
        cout << *p << endl;
    }
    cin.get();
}