Help with my string heapsort

[Trooper88]

I'm fairly new to algorithms, but i am working on heap sorting strings. The output should be
a
b
c
d
e

but instead it is
a
e
b
d
c

I am only using characters in the string array for testing currently, i will place full strings in once i figure out my problem. Can anyone give me some insight to my problem?

#include <stdio.h>
#include <stdlib.h>
#include <string.h>



typedef char * string;

void siftDown(string strs[], int root, int bottom);
void heapSort(string strs[], int array_size);

int main(int argc, char *argv[])

{

	
     int varcount = 5;

     string strs[5]; 
     int i;

     strs[0] = "c";
     strs[1] = "d";
     strs[2] = "e";
     strs[3] = "b";
     strs[4] = "a";



     heapSort(strs, varcount);

     for(i = 0;i < varcount;++i)
	 printf("%s\n", strs[i]);

	 
	 return 0;


}

void heapSort(string strs[], int array_size)
{
  int i;
  string temp[1];
 
  for (i = (array_size / 2); i >= 0; i--)
    siftDown(strs, i, array_size - 1);
 
  for (i = array_size-1; i >= 1; i--)
  {
    temp[0] = strs[0];
    strs[0] = strs[i];
    strs[i] = temp[0];
    siftDown(strs, 0, i-1);
  }
}
 
 
void siftDown(string strs[], int root, int bottom)
{
  int done, maxChild;
  string temp[1];
 
  done = 0;
  while ((root*2 <= bottom) && (!done))
  {
    if (root*2 == bottom)
      maxChild = root * 2;
    else if (strcmp(strs[root * 2], strs[root * 2 + 1]) >> 0)
      maxChild = root * 2;
    else
      maxChild = root * 2 + 1;
 
    if (strcmp(strs[root], strs[maxChild]) << 0)
    {
      temp[0] = strs[root];
      strs[root] = strs[maxChild];
      strs[maxChild] = temp[0];
      root = maxChild;
    }
    else
      done = 1;
  }
}

Any help would be much appreciated
My hypothesis is its something with the string compares, because it works for integers.

[itsme86]

>> is the right shift operator and << is the left shift operator. You're looking for greater-than > and less-than <.