请教个问题 帮我看看哪里错了 谢谢

Cocos2d-x
#1 
b2World* b2dJson::readFromFile(const char* filename, std::string& errorMsg)
{
    if (!filename)
        return NULL;
	std::string path = filename;
	cocos2d::CCFileUtils::sharedFileUtils()->removeSuffixFromFile(path);

	filename = cocos2d::CCFileUtils::sharedFileUtils()->fullPathFromRelativePath(path.c_str());
	cocos2d::CCLog(filename);

    std::ifstream ifs;
    ifs.open(filename, std::ios::in);
    if (!ifs) {
        //std::cout << "Could not open file " << filename << " for reading
";
        errorMsg = string("Could not open file ) + string(filename) + string( for reading");
        return NULL;
    }

    Json::Value worldValue;
    Json::Reader reader;
    if ( ! reader.parse(ifs, worldValue) )
    {
        //std::cout  << "Failed to parse " << filename << std::endl << reader.getFormattedErrorMessages();
        errorMsg = string("Failed to parse ) + string(filename) + string( : ") + reader.getFormatedErrorMessages();
        ifs.close();
        return NULL;
    }
    ifs.close();

    return j2b2World(worldValue);
}

请问这里面的path有错误么 我编译到android上面 得不到传入的文件 谢谢 指导