粒子の位置を出力する。 (2次元)
call cg_iric_write_sol_particle_pos2d(fid, count, x, y, ier)
ier = cg_iRIC_Write_Sol_Particle_Pos2d(fid, count, x, y);
cg_iRIC_Write_Sol_Particle_Pos2d(fid, x, y)