用于检查输入的二叉树是否为二叉树的子树的C ++程序
二叉树是一种树数据结构，其中每个节点最多具有两个子节点，这两个子节点被定义为左子节点和右子节点。
算法
Begin
function identical():
Take two nodes r1 and r2 as parameter.
If r1 and r2 is NULL then
Return true.
If r1 or r2 is NULL then
Return false.
Return (r1->d is equal to r2->d and
Call function Identical(r1->l, r2->l) and
Call functions Identical(r1->r, r2->r) );
function Subtree(node *T, node *S) :
if (S == NULL) then
return true;
if (T == NULL) then
return false;
if (call function Identical(T, S))
return true;
return Subtree(T->l, S) or Subtree(T->r, S);
End.范例程式码
#include <iostream>
using namespace std;
struct n {
int d;
struct n* l;
struct n* r;
};
bool Identical(struct n * r1, struct n *r2) {
if (r1 == NULL && r2 == NULL)
return true;
if (r1 == NULL || r2 == NULL)
return false;
return (r1->d == r2->d && Identical(r1->l, r2->l) && Identical(r1->r, r2->r) );
}
bool Subtree(struct n *T, struct n *S) {
if (S == NULL)
return true;
if (T == NULL)
return false;
if (Identical(T, S))
return true;
return Subtree(T->l, S) || Subtree(T->r, S);
}
struct n* newN(int d) {
struct n* nod =
(struct n*)malloc(sizeof(struct n));
nod->d = d;
nod->l = NULL;
nod->r = NULL;
return(nod);
}
int main() {
struct n *T = newN(24);
T->r = newN(2);
T->r->r = newN(5);
T->l = newN(7);
T->l->l = newN(3);
T->l->l->r = newN(40);
T->l->r = newN(6);
struct n *S = newN(20);
S->r = newN(5);
S->l = newN(3);
S->l->r = newN(50);
if (Subtree(T, S))
cout<<"given tree is subtree of Binary tree"<<"\n";
else
cout<<"given tree is not subtree of Binary tree"<<"\n";
struct n *T1 = newN(30);
T1->r = newN(20);
T1->r->r = newN(19);
T1->l = newN(17);
T1->l->l = newN(4);
T1->l->l->r = newN(40);
T1->l->r = newN(15);
struct n *S1 = newN(17);
S1->r = newN(15);
S1->l = newN(4);
S1->l->r = newN(40);
if (Subtree(T1, S1))
cout<<"given tree is subtree of Binary tree";
else
cout<<"given tree is not subtree of Binary tree";
getchar();
return 0;
}输出结果
given tree is not subtree of Binary tree given tree is subtree of Binary tree
热门推荐
10 八一幼儿祝福语大全简短
11 公司乔迁食堂祝福语简短
12 婚礼结束聚餐祝福语简短
13 儿媳买车妈妈祝福语简短
14 毕业送礼老师祝福语简短
15 同事辞职正常祝福语简短
16 恭贺新婚文案祝福语简短
17 金店立秋祝福语简短英文
18 婆婆高寿祝福语大全简短