说明：  偏微分方程数值解上机实习 运用古典显式差分格式求解二维扩散方程的初边值问题 运用P-R差分格式求解二维扩散方程的初边值问题 运用局部一维格式求解二维扩散方程的初边值问题 给出了源程序，运行结果，以及算法比较
(Numerical solution of partial differential equations on the use of classical machine internship explicit difference scheme for solving two-dimensional diffusion equation of the initial boundary value problem of the use of PR difference scheme for solving two-dimensional diffusion equation of the initial boundary value problem of the use of partial solution of one-dimensional style of the early two-dimensional diffusion equation boundary value problem gives the source code, run the results of the comparison algorithm)