int rowNumber = 10, colNumber = 10;
  int[,]a=new int [rowNumber,colNumber];
  double cellsize=1;
  int lineID = 1,col,j,row;
  double x1 = 1, y1 = 2;
  double x2 = 8, y2 = 6;
  double k = (y2-y1)/(x2-x1),b = y1-x1*k;  
  int col1=(int)(x1/cellsize),col2=(int)(x2/cellsize);
  int row1=(int)(y1/cellsize),row2=(int)(y2/cellsize);
  if (k > 1 || k < -1)
  {  
  for (col= col1; col < col2;col++ )
  {
  double y0 =col*k+b;
   
  double x = col+1;
  double y = x*k+b;
  double p = Math.Ceiling(y-y0);
  for(j=0;j<p;j++)
  {
  int yz = (int)(y0);
  a[yz, col] = lineID;
  Console.WriteLine("a[{0},{1}]={2}", yz,col, a[yz, col]);

  y0++;
  }
   
   
  }
   
  }
  else
  {
  for (row = row1; row < row2;row++ )
  {
  double x0 =(row-b)/k;
   
  double y = row+1;
  double x = (y-b)/k;
  double p = Math.Ceiling(x - x0);
   
  for(j=0;j<p;j++)
  {
  int xz = (int)(x0);
  a[row, xz] = lineID;
  Console.WriteLine("a[{0},{1}]={2}", row,xz, a[row,xz]);
 ;
  x0++;
   
   
  }
   
   
  }
   
  }



程序定义了一个10乘10的数组。。想要看看从点（1，2）到点（8，6）形成的线段穿过了哪些“格子”。。然后给穿过的这些格子赋值lineID。。。。每次运行出来结果都不对。好像差了几个格子。请各位前辈指教一下。。。很着急很着急！！！非常感谢！！！