C++-如何使用JSONCPP库来读写JSON文件(搭建环境)

voidCMFCApplication4Dlg::OnBnClickedButton1()
{
    //TODO: 在此添加控件通知处理程序代码

    string f = "D:\1\2\123.json";

    //写json文件
Json::Value root;
    Json::FastWriter writer;
    Json::Value person;

    person["age"] = 28;
    person["name"] = "sb";
    root.append(person);

    string json_file =writer.write(root);
    ofstream ofs;
    ofs.open(f);
    assert(ofs.is_open());
    ofs <<json_file;

}

voidCMFCApplication4Dlg::OnBnClickedButton2()
{
    //TODO: 在此添加控件通知处理程序代码

    //读json文件
ifstream ifs;
    ifs.open("D:\1\2\123.json");
    assert(ifs.is_open());

    Json::Reader reader;
    Json::Value root;

    if (!reader.parse(ifs, root, false))
    {
        AfxMessageBox("reader parse error");
        return;
    }

    stringname;
    intage;
    intsize;

    size =root.size();
    for (int i = 0; i < size; i++)
    {
        name = root[i]["name"].asString();
        age = root[i]["age"].asInt();

        char msg[256];
        sprintf_s(msg, "%s,%d", name.c_str(), age);
        AfxMessageBox(msg);
    }

}