#include<iostream.h>
#include<stdlib.h>
/*This code is written by NF between any time of 120711 and 210711;modified at 231211*/

int main()
{
    int length=0,min_heapified=0,start_length=0,index=0;
    cout<<"Enter Array Length:";
    cin>>length;
    int array[length];
    for(int i=0;i<length;i++)
    {
        array[i]=rand()%100;
    }
    cout<<"Array is filled now with random elements";
    cout<<"nSorted Array:"<<endl;
    do
    {
            do
            {
                min_heapified=0;
                for(int root=0;root<length/2;root++)/*As the leaf nodes have no child they should not be in a consideration while swapping so looping upto length/2 is enough*/
                {

                    int left=((2*root)+1);
                    int right=((2*root)+2);

                    if(left<length)
                    {
                           if(array[left]<array[root])
                           {
                                int swap=array[left];
                                array[left]=array[root];
                                array[root]=swap;
                                min_heapified=1;
                           }
                     }
                    if(right<length)
                     {
                            if(array[right]<array[root])
                            {
                                 int swap=array[right];
                                 array[right]=array[root];
                                 array[root]=swap;
                                 min_heapified=1;
                             }
                      }

                  }

             }while(min_heapified>0);

            int swap=array[0];
            array[0]=array[--length];/*modification done at this point to avoid keeping the sorted elements into another array;and swapping done between the 0th and last element*/
            array[length]=swap;
            cout<<array[length]<<" ";

 }while(length>0);

  return 0;

}

void heapsort(int *begin, int *end)
{
    // assume end is one pass the last element. eg. arry + length;
    heapify(begin, end);

    while(begin != --end)
    {
        swap(*begin, *end);     // invariant: the next item to order will be at the top
        // after the swap, the next biggest/smallest item may not be
        // at the top. use push_down to fix this and preserve the heap property.
        push_down(begin, end);
    }
}

void push_down(int *begin, int *end, size_t defender = 0)
{
    // at the very bottom?
    if(defender >= std::distance(begin, end) / 2) return;

    size_t challenger = defender * 2 + 1;
    // is there a right-child?
    // Note that in even# arrays, last parent doesn't have a right child
    if(begin + challenger + 1 != end)
        if(begin[challenger + 1] < begin[challenger])
            ++challenger;

    // defended successfully?
    if( !(begin[challenger] < begin[defender]) ) return;

    // challenger wins
    std::swap(begin[challenger], begin[defender]);
    push_down(begin, end, challenger);
}

int length=0,min_heapified=0,start_length=0,index=0;

do {
    int min_heapified = 0;
    do {
...

if(x<=(length-1))

if (x < length)

int swap=array[left];
array[left]=array[root];
array[root]=swap;

int swap(array, index, rootIndex) {
    int swap = array[index];
    array[index] = array[rootIndex];
    array[root] = swap;
}

if(array[left]<array[root])
{
    int swap=array[left];
    array[left]=array[root];
    array[root]=swap;
    min_heapified=1;
}

int swapIfLess(array, index, rootIndex) {
    if (array[index] < array[rootIndex]) {
        swap(array, index, rootIndex)
        return 1;
    }
    return 0;
}

if (left < length) {
    if (swapIfLess(array, left, root)) {
        min_heapified=1;
    }
}
if (right < length) {
    if (swapIfLess(array, right, root)) {
        min_heapified=1;
    }
}

int root=i;

for (int root = 0; root < length; root++)

int length=0,min_heapified=0,start_length=0,index=0;

int array[length],sorted_array[length];

if(root <= (length-1))
// Prefer the following
if(root < length)

if(root < length)

for(int root=0;root<length;root++)
// prefer
for(int root=0;root<length;++root)

min_heapified=0;

bool min_heapified = false;