ID3算法源程序。使用的方法是编写一个*.dat文件保存样本数据，还有一个*.tag文件保存属性列名，且最后一个属性是标号属性。运行是输入id3 文件名。输出格式是一个二叉判定树。-ID3 algorithm source. The method used was to prepare a document preservation *. dat sample data, a document preservation *. tag attributes listed, and the final one is the attribute label attributes. Running importation id3 file. Output format is a binary decision tree.