计算方法\Exe4\Exe4.m ........\....\GauSei.m ........\....\Jacobi.m ........\...3\Catch.m ........\....\Exe3.m ........\....\Matrix.m ........\...2\Cholesky.m ........\....\Doolittle.m ........\....\Exe2.m ........\Doolittle\Doolittle.m ........\.........\mainfun.m ........\Exe4 ........\Exe3 ........\Exe2 ........\Doolittle 计算方法