Function check_file_exist

examples/common/common.cpp:132–142

}

bool check_file_exist(const std::string file_name)
{
    FILE* fp = fopen(file_name.c_str(), "r");
    if(!fp)
    {
        std::cerr << "Input file not existed: " << file_name << "\n";
        return false;
    }
    fclose(fp);
    return true;
}