Untitled3

代码说明：

  本程序利用显式差分格式，将波动方程离散化，进而求出波动方程的数值解，不断地细化空间和时间步长，可以让数值解逼近理论解。(The program with the implicit difference method, the discrete wave equation, the numerical solution is obtained, continue to refine the long walk the numerical solution can approach the theoretical solution.)