【ACM模板】堆排序

#include <cstdlib>
#include <cstdio>
#include <cstring>
#include <iostream>
#include <time.h>
using namespace std;
const int HEAPSIZE = 10;
int heap[HEAPSIZE + 1];
int MAKEHEAP(int i ,int size)
{
    int child,rootkey,tmp;
    tmp = heap[i];
    rootkey = heap[i];
    child = 2 * i;
    while ( child <= size)
    {
        if ( (child < size ) && heap[child] > heap[child+1] )
            child++;
        if( tmp < heap[child] )  //這裏我傻了吧唧的打成了heap[i] < heap[child]了，結果WAWAWA
            break;
        else{
            heap[child/2] = heap[child];
            child = child*2;
        }
    }
    heap[child/2] = tmp;
}
int main()
{
    srand(time(NULL));
    for(int i = 1 ; i <= HEAPSIZE; i++)
    {
        heap[i] = rand() % 100;
    }
    printf("Before Sorting: \n");
    for(int i = 1 ; i <= HEAPSIZE; i++)
    {
        printf("%d  ",heap[i]);
        if(i % 5 == 0 ) printf("\n");
    }
    for(int i = (HEAPSIZE   ) / 2; i > 0 ; i--)
    {
        MAKEHEAP(i,HEAPSIZE);
    }
    int tmp = 0;
    printf("After sorting:\n");
    for (int i = HEAPSIZE - 1 ; i > 0; i--)
    {
        tmp = heap[1];
        heap[1] = heap[ i + 1];
        printf("%d ",tmp);
        if( i % 5 == 0 ) printf("\n");
        MAKEHEAP(1,i);
    }
    printf("%d ",heap[1]);
    return 0;
}