这是用于线性方程组求解的ILUT预处理算法的实现。在VC++编译通过。矩阵采用压缩稀疏行格式存储（CSR） 很容易移植到自己定义数值计算软件包中。经本人测试计算效率比Fortran写的高很多（比如与Sparskit2比较）。-This is used for solving linear equations ILUT preconditioning algorithm. In VC++ Compiled through. Matrix using compressed sparse row storage format (CSR) is very easy to transplant to their own definition of numerical computation package. I tested by calculating the efficiency ratio is much higher Fortran write (for example, compared with Sparskit2).