该资源是决策树算法。从“样本特征说明”读取属性，从“样本数据”读取各属性值。 依次取20 —80 （每次递增10 ）的样本作为训练集，剩余样本作为测试集测试。-This resource is about decision tree algorithm. The attributes and values can be read by the code from the two txt files. Each time choose