说明：   Toro的经典书 "Riemann Solvers and Numerical Methods for Fluid Dynamics" 中的算例程序。该程序求解二维笛卡尔网格下的理想气体欧拉方程程序。采用TVD格式与HLLC的近似黎曼解相结合，二维处理采用维数分裂，求解扩张一维问题。6种通量限制器可供选择。
( to solve the two-dimensional Euler equations for an ideal gas on a Cartesian quadrilateral domain using the TVD WAF method in conjunction with the HLLC approximate Riemann solver and dimensional splitting. A selection of 6 limiter functions is available )