声波方程规则网格的PML边界条件正演模拟 -acoustic wave equation modeling

实现了规则网格下的声波波动方程有现车分正演模拟，时间2阶空间4阶-Achieve the acoustic wave equation under the rules of the grid there are cars of forward modeling, time 2 order spatial order 4

此程序是基于c语言编写的地震正演模拟程序，做地震正演模拟的同学可自取。(This program is written in C language program based on seismic forward modeling, seismic forward modeling do the students can pick up.)