band0.c

数值分析算法描述与习题解答

  #include "band.c"
  #include "stdio.h"
  main()
  { int i;
    static double b[8][5]={ {3.0,-4.0,1.0,0.0,0.0},
    {-2.0,-5.0,6.0,1.0,0.0},{1.0,3.0,-1.0,2.0,-3.0},
    {2.0,5.0,-5.0,6.0,-1.0},{-3.0,1.0,-1.0,2.0,-5.0},
    {6.0,1.0,-3.0,2.0,-9.0},{-4.0,1.0,-1.0,2.0,0.0},
    {5.0,1.0,-7.0,0.0,0.0}};
    static double d[8][3]={ {13.0,29.0,-13.0},
    {-6.0,17.0,-21.0},{-31.0,-6.0,4.0},{64.0,3.0,16.0},
    {-20.0,1.0,-5.0},{-22.0,-41.0,56.0},{-29.0,10.0,-21.0},
    {7.0,-24.0,20.0}};
    if (band(8,2,5,3,b,d)>0)
      for (i=0;i<=7;i++)
      printf("x(%d)=%13.7e,  %13.7e,  %13.7e\n",
            i,d[i][0],d[i][1],d[i][2]);
  }