程式碼連結：
http://www.rulequest.com/Personal/c4.5r8.tar.gz

file_structure.dot

digraph abc
{

"c4.5.c";
"besttree.c";
"build.c";
"info.c";
"contin.c";
"discr.c";
"c4.5.c"->"besttree.c";
"besttree.c"->"build.c";
"build.c"->"info.c";
"info.c"->"contin.c";
"info.c"->"discr.c";



}

執行方法：
dot -Tpng -o file_structure.png ./file_structure.dot
結果如下：

function_structure.dot

digraph abc{
"main()";
"FormTree()";
"EvalDiscreteAtt()";
"TotalInfo()";
"CVal";

"main()"->"OneTree()";
"OneTree()"->"InitialiseTreeData()"
"OneTree()"->"FormTree()";
"FormTree()"->"EvalDiscreteAtt()";
"FormTree()"->"EvalContinuousAtt()";

"EvalContinuousAtt()"->"TotalInfo()";
"EvalContinuousAtt()"->"CVal";
"EvalContinuousAtt()"-> "ComputeGain()";

"EvalDiscreteAtt()"->"DiscrKnownBaseInfo()";
"EvalDiscreteAtt()"-> "ComputeGain()";
"EvalDiscreteAtt()"->"TotalInfo()";

}
 

執行方法：
dot -Tpng -o function_structure.png ./function_structure.dot
結果如下：