摘要： 1 #include<iostream.h> 2 struct tree 3 { 4 int data; 5 tree *left,*right; 6 }; 7 class Btree 8 { 9 static int n; 10 static int m; 11 public: 12 tree *root; 13 Btree() 14 { 15 root=NULL; 16 } 17 void create_Btree(int); 18 void Preorder(tree *)... 阅读全文