老师布置的作业（传热学的一维稳态导热数值计算），可是有点问题，查了好几天了。可以运行，但是结果有问题。传上来希望有热心人可以帮忙看看哪里有问题，过几天还有个非稳态的，愁啊-Teacher assignments (one-dimensional heat transfer numerical steady heat conduction), but a problem, check for several days. Can run, but the results are questionab