poisson.f90 是矩形区域上泊松方程Dirichlet边值问题差分求解的fortran程序，可选择Jacobi或者Gauss-Seidel迭代子程序，其中Jacobi迭代次数为925，Gauss-Seidel迭代次数为478。结果输出至solution.dat文件

poisson.ncl 是NCL脚本，运行该脚本得到的图为result.pdf



thomas.f90 是追赶法解代数方程组的fortran程序。控制分辨率n的不同取值，输出以下文件：

thomas(n=3).dat

thomas(n=5).dat

thomas(n=10).dat

thomas(n=20).dat

thomas.ncl 是NCL脚本，运行该脚本得到的图为result.pdf-poisson.f90 is a rectangular area on the Poisson equation solving Dirichlet Boundary Value Difference fortran program, you can choose Jacobi or Gauss-Seidel iteration subroutine, which Jacobi iterations is 925, Gauss-Seidel iterations is 478. The results are output to the solution.dat file poisson.ncl NCL scr ipt, run the scr ipt to get the picture shows result.pdf thomas.f90 is catching method for solving algebraic equations fortran program. Control resolution of n different values, output the following files: thomas (n = 3). Dat thomas (n = 5). Dat thomas (n = 10). Dat thomas (n = 20). Dat thomas.ncl is NCL scr ipt, run the scr ipt to get the picture shows result.pdf