点集分类

题目：将一个m×n的矩阵A中的所有点，按照一定的规则分成不同的类别并分别标记。

分类和标记规则如下：

(1) A[0][0]作为坐标原点，矩阵行增加方向为X轴正方向，列增加方向为Y轴正方向，并且标记A[0][0]=0。

(2) 以坐标原点为起始点画出分类向量v1和v2及其反向量—v1和—v2，将分类向量v1和v2及其反向量—v1和—v2的起点和终点标记为同一类点，即标记为同一个数字。

(3) 然后以向量的终点作为起点，重复操作⑵，直到矩阵中所有的点被标记完。

-Points classification

Title: an m × n matrix A all points, according to certain rules into different categories and labeled.

Classification and labeling rules are as follows:

(1) A [0] [0] as the coordinate origin, the matrix row direction increase X-axis positive direction, increase the column direction Y-axis positive direction, and mark A [0] [0] = 0.

(2) as the starting point to the origin of coordinates to draw classification vectors v1 and v2 and reverse the amount-v1 and-v2, the classification vectors v1 and v2 and reverse the amount-v1 and-v2 mark the start and end points for the same category , that is labeled with a number.

(3) and then to the end of the vector as a starting point, repeat ⑵, the matrix until all points are marked complete.