选取一个浮点数，并产生一些随机数，把浮点数转化为整数型-Select a float, and generate some random numbers, the floating-point number into integer

此VC++对opencv中的cvMat数据矩阵直接进行操作，将矩阵中的数据类型转换成高精度的浮点数据类型。-This VC++ opencv to the cvMat data matrix directly operation, the data in a matrix type conversion into high precision floating-point data type.

基于最小二乘法的直线拟合，链表成员是浮点型的点-it can be used to fitting line in opencv after find contours,the list member is PointF