C++ 十六进制字符串转int

int funs(const char *str)
{
    unsigned int x;
    std::stringstream ss;
    ss << std::hex << str;
    ss >> x;
    // output it as a signed type
    std::cout << static_cast(x) << std::endl;
    return static_cast(x);
}

#define HEXSTR2INT(str) funs(str)

调用：

cout<