数据结构练习（05）二元查找树的后序遍历结果

http://zhedahht.blog.163.com/blog/static/25411174200725319627/

#include <cstdio>
#include <cstdlib>
#include <cstring>


bool verify_bft_squence(int a[], int s, int e)
{
    if (a == NULL || s > e)
        return false;

    if (s == e)
        return true;

    int i;
    for (i = s; i <= e; ++i)
        if (a[i] > a[e])
            break;

    int j;
    for (j = i; j <= e; ++j)
        if (a[j] < a[e])
            return false;

    bool left = true;
    if (s <= i-1)
        left = verify_bft_squence(a, s, i-1);

    bool right = true;
    if (i <= e - 1)
        right = verify_bft_squence(a, i, e - 1);

    return (left && right);
}

int main()
{
    int a[10] = {0, 5, 7, 6, 9, 11, 10, 8};
    bool flag = verify_bft_squence(a, 1, 7);
    return 0;
}