用追赶法求20阶三对角方程Tx=f的解，其中T是一个上、下带宽均为1的稀松矩阵-Method used to catch up with 20-order tridiagonal equation Tx = f the solution, in which T is an upper and lower bandwidth matrix are sloppy 1

哈工大C++郭勇老师授课，作业三答案，仅供参考-HIT C++ Guo teachers to teach, work three answers for reference purposes only