决策树算法ID3的代码实验，编译后可直接使用的ID3代码,ID3 decision tree algorithm code experiments, compiled code can be directly used in ID3

针对样本决策库数据量大的问题选用基于粗糙集对提取的样本数据进行离散化-Sample library data for decision-making problem of large sample selection based on rough sets were discrete data extraction