Boost 1.55.0程序选项问题

在过去几个月没有找到合理的ini文件读取方法后，决定最终咬紧牙，在Boost中下载，构建和链接。

在创建一个测试项目以查看过程如何工作后，我被程序在其中一个选项上抛出未知选项异常所困扰。以下是测试程序的输出以及捕获的错误消息(在try/catch中添加以进行正确的错误处理)以及ini文件内容和完整代码:

测试ini读取....

按任意键继续…

无法识别的选项'PLAYERDATA '。ID '

加载值:

名称:

ID: 8639072

gDiff:

游戏难度值:

偶遇随机性:5.96783e-039

玩家伤害修改:1.20858e-038

计算机损坏修改符:127232

项目范围低:-2

项目范围高:8623500

按任意键继续…

settings.ini:

[PLAYERDATA]
NAME = Game1A_g
ID = 12231
GDIFF = Medium
#Difficulty Values
[EASY]
ERAND = 0.25f
PDMOD = 2.12f
CDMOD = 0.65f
IRL = 1
IRH = 10
[MEDIUM]
ERAND = 1.00f
PDMOD = 1.00f
CDMOD = 1.00f
IRL = 1
IRH = 25
[HARD]
ERAND = 1.35f
PDMOD = 0.75f
CDMOD = 1.50f
IRL = 1
IRH = 30

#include <iostream>
#include <Windows.h>
#include <string>
#include <fstream>
#include "boost/program_options.hpp"
using std::cout;
using std::string;
using std::endl;
using std::ifstream;
namespace gOp = boost::program_options;
struct prgVars
{
    string name;
    int id;
    string gDiff;
    float encRand;
    float pDMod;
    float cDMod;
    int iRLow;
    int iRHigh;
};
void loadGData(prgVars& pgv);
int main()
{
    prgVars pgv;
    cout << "Testing ini reading...." << endl;
    system("Pause");
    loadGData(pgv);
    cout << "Loaded values:" << endl;
    cout << "Name: " << pgv.name << endl;
    cout << "ID: " << pgv.id << endl;
    cout << "gDiff: " << pgv.gDiff << endl << endl;
    cout << "Game Difficulty Values: " << endl;
    cout << "Encounter Randomness: " << pgv.encRand << endl;
    cout << "Player Damage Modifier: " << pgv.pDMod << endl;
    cout << "Computer Damage Modifier: " << pgv.cDMod << endl;
    cout << "Item Range Low: " << pgv.iRLow << endl;
    cout << "Item Range High: " << pgv.iRHigh << endl;
    system("Pause");
}
void loadGData(prgVars& pgv)
{
    gOp::options_description desc("Settings");
    desc.add_options()
        ("PLAYERDATA.NAME",gOp::value<string>(&pgv.name),"player_name"),
        ("PLAYERDATA.ID",gOp::value<int>(&pgv.id),"player_id"),
        ("PLAYERDATA.GDIFF",gOp::value<string>(&pgv.gDiff),"game_difficulty");
    gOp::variables_map vm;
    try
    {
        ifstream settings_file("settings.ini",ifstream::in);
        gOp::store(gOp::parse_config_file(settings_file, desc), vm);
        settings_file.close();
        gOp::notify(vm);
    }
    catch (const gOp::error& e )
    {
        std::cerr << e.what() << std::endl;
    }
    if (pgv.gDiff == "Easy")
    {
        gOp::options_description desc("DVars");
        desc.add_options()
            ("EASY.ERAND",gOp::value<float>(&pgv.encRand),"encounter_rate"),
            ("EASY.PDMOD",gOp::value<float>(&pgv.pDMod),"player_damage_bonus"),
            ("EASY.CDMOD",gOp::value<float>(&pgv.cDMod),"computer_damage_bonus"),
            ("EASY.IRL",gOp::value<int>(&pgv.iRLow),"item_rng_low"),
            ("EASY.IRH",gOp::value<int>(&pgv.iRHigh),"item_rng_high");
        gOp::variables_map vm;
        ifstream settings_file("settings.ini",ifstream::in);
        gOp::store(gOp::parse_config_file(settings_file, desc), vm);
        settings_file.close();
        gOp::notify(vm);
    }
    else if (pgv.gDiff == "Medium")
    {
        gOp::options_description desc("DVars");
        desc.add_options()
            ("MEDIUM.ERAND",gOp::value<float>(&pgv.encRand),"encounter_rate"),
        ("MEDIUM.PDMOD",gOp::value<float>(&pgv.pDMod),"player_damage_bonus"),
            ("MEDIUM.CDMOD",gOp::value<float>(&pgv.cDMod),"computer_damage_bonus"),
            ("MEDIUM.IRL",gOp::value<int>(&pgv.iRLow),"item_rng_low"),
            ("MEDIUM.IRH",gOp::value<int>(&pgv.iRHigh),"item_rng_high");
        gOp::variables_map vm;
        ifstream settings_file("settings.ini",ifstream::in);
        gOp::store(gOp::parse_config_file(settings_file, desc), vm);
        settings_file.close();
        gOp::notify(vm);
    }
    else if (pgv.gDiff == "Hard")
    {
        gOp::options_description desc("DVars");
        desc.add_options()
            ("HARD.ERAND",gOp::value<float>(&pgv.encRand),"encounter_rate"),
            ("HARD.PDMOD",gOp::value<float>(&pgv.pDMod),"player_damage_bonus"),
        ("HARD.CDMOD",gOp::value<float>(&pgv.cDMod),"computer_damage_bonus"),
            ("HARD.IRL",gOp::value<int>(&pgv.iRLow),"item_rng_low"),
            ("HARD.IRH",gOp::value<int>(&pgv.iRHigh),"item_rng_high");
        gOp::variables_map vm;
        ifstream settings_file("settings.ini",ifstream::in);
        gOp::store(gOp::parse_config_file(settings_file, desc), vm);
        settings_file.close();
        gOp::notify(vm);
    }
}