给出了二维泊松方程在单位正方形上的五点差分格式。并运用线性方程组的古典迭代解法——Jacobi迭代求解出在区域上的数值解。最终绘制数值解的图形。-For two at a loose equation in a unit of the square to five o clock. the format and use of linear equations that of classical iterative solution — — jacobi iterative the solutio