C++ (Cpp) abs_func示例

示例#1

文件： vexcl_abs.hpp 项目： NightOwlsEntertainment/PetBox_A_Journey_to_Conquer_Elementary_Algebra

typename std::enable_if<
    std::is_integral<T>::value,
    typename boost::proto::result_of::make_expr<
        boost::proto::tag::function,
        abs_func,
        const vex::multivector<T, N>&
    >::type const
>::type
abs(const multivector<T, N> &arg) {
    return boost::proto::make_expr<boost::proto::tag::function>(
            abs_func(),
            boost::ref(arg)
            );
}

示例#2

文件： AmUtils.cpp 项目： Chocolatbuddha/sems

string signed2str(T val, T (*abs_func) (T), DT (*div_func) (T, T))
{
  char buffer[64] = {0,0};
  int i=62;
  DT d;

  d.quot = abs_func(val);
  do{
    d = div_func(d.quot,10);
    buffer[i] = _int2str_lookup[d.rem];
  }while(--i && d.quot);

  if (i && (val<0)) {
    buffer[i]='-';
    i--;
  }

  return string((char*)(buffer+i+1));
}