介绍了在提取穿越次数特征、粗网格特征以及密度特征提取的基础上应用SVM进行手写体阿拉伯数字识别的方法。-Introduced the extraction across a number of features, coarse grid and density feature extraction on the basis of the application of SVM method for handwritten digits recognition.

自定义两个exception类，编写一段程序使用这两个类，从标准输入读入字符串，当字符串为空时抛出一个exception当字符串包含阿拉伯数字时抛出另一个exception 捕获exception-Two custom exception class, write a program using these two classes, read the standard input string, the string is empty when thrown exception when a