C++ (Cpp) Float::mul示例

示例#1

文件： util.cpp 项目： cr-marcstevens/fplll

/**
 * Computes the volume of a d-dimensional hypersphere of radius 1.
 */
void sphere_volume(Float &volume, int d)
{
  Float rtmp1;
  volume = pow(M_PI, (double)(d / 2));

  if (d % 2 == 0)
    for (int i = 1; i <= d / 2; i++)
    {
      rtmp1 = (double)i;
      volume.div(volume, rtmp1);
    }
  else
    for (int i = 0; i <= d / 2; i++)
    {
      rtmp1 = 2.0 / (double)(2 * i + 1);
      volume.mul(volume, rtmp1);
    }
}