基于有限差分法的静电场计算程序。注释详细，便于学习。

可以计算任意简单形状的导体在任意介质中的静电场分布。采用有限差分法建立方程，并用迭代法求解，最后绘制电场图形。求解速度较快。-Electrostatic field calculation program based on the finite difference method. Detailed annotation, and easy to learn. An electrostatic field distribution of arbitrarily simple shape of the conductor can be calculated in any medium. Equations using the finite difference method and iterative method for solving the last drawing field pattern. Solving faster.