海量数据

//参考链接：http://blog.chinaunix.net/uid-25324849-id-2182916.html
#include <iostream>

using namespace std;

const int N = 10000000;
const int FILE_NUM = 5;
const int MAX_PART = 1000000;
const int MIN = -1;     //最小值, 必须比要排序数字的最小值要小，否则出错
const int MAX = N + 1;  //最大值 ,必须比要排序数字的最大值要大，否则出错

//调整
void adjust(int ls[], int data[], int s)
{
    int t = (s + FILE_NUM)/2;
    while (t)
    {
        if (data[s] > data[ls[t]])
        {
            int temp = s;
            s = ls[t];
            ls[t] = temp;
        }
            t /= 2;
    }
    ls[0] = s;
}

void create_loser_tree(int ls[], int data[])
{
    data[FILE_NUM] = MIN;
    for (int i = 0; i < FILE_NUM; i++)
    {
        ls[i] = FILE_NUM;
    }
    for (int i = FILE_NUM - 1; i >= 0; i--)
    {
        adjust(ls, data, i);
    }
}

void merge_sort_by_losertree(int *data)
{
    int ls[FILE_NUM];             //存放败者索引的节点


    create_loser_tree(ls, data); //创建败者树
       for(int i = 0;i<FILE_NUM;i++)
            cout << data[i] << " ";
      cout << "    min:" ;
      cout << data[ls[0]] << endl;
      data[4] = 3;
      adjust(ls, data, ls[0]);
       for(int i = 0;i<FILE_NUM;i++)
            cout << data[i] << " ";
      cout << "     min:" ;
      cout << data[ls[0]] << endl;
}

int main()
{
       int data[10+1] = {13,5,6,4,99,9,12,17,13,4};
    merge_sort_by_losertree(data);
    return 0;
}