So I am programming a heap sort and i am gettin pretty close to where i need to be, but I am having trouble in one of my functions when it heapifies my array. here is the code.

```
#include<iostream>
using namespace std;
class Heapsort
{
private:
int *array;
int mysize;
public:
Heapsort(int);
~Heapsort();
bool empty();
int percolate_down(int);
void heapify();
void fill_array();
void print();
};
Heapsort::Heapsort(int a)
{
mysize = a;
int *array = new int[mysize];
}
Heapsort::~Heapsort()
{
delete [] array;
}
void Heapsort::fill_array()
{
int i;
for (i = 1; i < mysize; i++){
cout << "\nEnter a number: ";
cin >> array[i];
}
print(); //This is here to check for the error im getting.
}
int Heapsort::percolate_down(int r)
{
int t=0;
int c = 2*r;
while (r < mysize){
if ((c < mysize) && (array[c] < array[c+1])){
c++;
}
if (array[r] < array[c]){
t = array[c];
array[c] = array[r];
array[r] = t;
r=c;
c=2*c;
print(); //Again, checking the error, the print out shows that
}else{ //the data somehow changes in the middle of loop
break;
}
}
return (r);
}
void Heapsort::heapify()
{
int r = mysize/2;
for(r; r > 0; r--){
percolate_down(r);
}
}
void Heapsort::print()
{
int j;
cout << endl << endl;
for (j=1; j < mysize; j++)
cout << array[j] << " ";
}
int main()
{
Heapsort heap(7);
cout << endl << endl;
heap.fill_array();
heap.heapify();
heap.print();
cout << endl << endl;
return (0);
}
```

And this is the out put i am getting.

AFTER I INPUT THE INTEGERS INTO ARRAY:

1 2 3 4 5 6

DURING MY WHILE LOOP IN PERCOLATE_DOWN():

1 2 6 4 5 3

1 5 6 4 2 3

1 5 6 4 671410272 3

6 5 1 4 671410272 3

6 5 3 4 671410272 1

6 5 3 4 671410272 1

I have no idea why in the middle of the loop, the data point just changes.

p.s. I havnt gotten to the sorting part, this is just up to put the data into a heap.