激波管问题是一个典型的一维可压缩无黏气体动力学问题，有解析解。对它采用二阶精度两步差分格式进行数值求解。这里给出了计算程序-Shock tube problem is a typical one-dimensional compressible inviscid gas dynamics problem, there are analytical solution. It uses a two-step difference scheme of second order accuracy num