tree_01.c

#include<stdio.h>

void create_btree(int *b_tree,int *nodelist,int len)
{
    int i=0;
    int level;

    b_tree[1]=nodelist[1];
    for(i=2;i<len;i++)
    {
        level=1;
        while(b_tree[level]!=0)
        {
            if(nodelist[i]<b_tree[level])
                level=level*2;
                else
                    level=level*2+1;
        }
        b_tree[level]=nodelist[i];
    }

}


void main()
{
    int i;
    int index=1;
    int data;
    int b_tree[16];
    int nodelist[16];
    printf("please input the binary tree(exit for 0)");


    scanf("%d",&data);
    while(data!=0)
    {
        nodelist[index]=data;
        index++;
        scanf("%d",&data);
    }

    //清除二叉树组的内容
    for(i=0;i<16;i++)
    {
        b_tree[i]=0;
    }

    //建立二叉树
    create_btree(b_tree,nodelist,index);

    //输出二叉树
    printf("\n the binary tree is :\n");
    for(i=1;i<16;i++)
    {
        printf("%2d:[%d] \n",i,b_tree[i]);
    }

}

 用这种数组来保存二叉树，会造成大量的浪费，数组的序号是按满二叉树排的