使用数据挖掘中提供的方法对数据进行预处理，C45算法选择主要属性-preprocess the data using the algorithms of data mining and select the important atributes using C45

Sorts countries by different atributes, with 11 different sorting alghoritems (1)straightInsertion 2)binaryInsertion 3)straightSelection 4)bubbleSort1 5)bubbleSort2 6)shakerSort 7)shellSort1\n8)heapSort 9)quickSort R 10)

Source code of attributes for pattern recognition

Change file attributes; useful program to uncover hidden files after some virus attacks