采用以下四种格式：中心差分、一阶迎风、混合格式和QUICK格式对一维稳态无源项的对流-扩散方程进行求解-The following four formats: central difference, the first order upwind, QUICK format mixed formats and one-dimensional steady-state passive entry of convection- diffusion equations were solved

本程序实现了一维稳态无源项的对流-扩散方程的数值解法，采用的离散格式包括中心差分，一阶迎风，混合格式与QUICK格式。并画出其与精确解的比较。-This program implements a one-dimensional steady-state convection passive items- diffusion equations numerical solution, a discrete format used include center differential, the f