JsonCpp

python amalgamate.py

{
    "name": "홍 길동",
    "age": 32,
    "arr": [1, 2, 3, 4],
    "position":
    {
        "xpos": 100,
        "ypos": 50
    }
}

bool ReadFromFile(const char* filename, char* buffer, int len)
{
    FILE* fp = nullptr;
    fopen_s(&fp ,filename, "rb");

    if (fp == nullptr)
    {
        return false;
    }

    size_t fileSize = fread(buffer, 1, len, fp);

    fclose(fp);

    return true;
}

int JsonTest2()
{
    int len = 1000;
    char buffer[1000];

    if (ReadFromFile("mytest.json", buffer, len) == false)
    {
        return -1;
    }

    std::string config_doc = buffer;
    Json::Value root;
    Json::Reader reader;
    bool parsingSuccessful = reader.parse( config_doc, root );
    if (parsingSuccessful == false)
    {
        return -1;
    }

    std::cout << "position xpos:    " << root["position"]["xpos"].asInt() << std::endl;
    std::cout << "position ypos:    " << root["position"]["ypos"].asInt() << std::endl;

    if(!root["position"].isMember("zpos"))
        std::cout << "zpos does not exist." << std::endl;
    return 0;
}