C :: Array Sort With Qsort By Using Two Criteria?

I am starting a new thread. So I try to sort an array with qsort and then save the new order, so this means if I have a list like:

4 3 7 2 [0] [1] [2] [3],
after sorting it becomes:
2 3 4 7 [3] [1] [0] [2] <== this is what I want to have!

Which works fine, with following code:

void qsort_my(int *a, int l, int r, int *array_order) {
int j;
if( l < r ) {
j = split( a, l, r, array_order);
qsort_my( a, l, j-1, array_order);
qsort_my( a, j+1, r, array_order);

[Code]...

I tried to add the criteria :

(if (a[i] != a[j] || (a[i] == a[j] && array_order[i] > array_order[j])))

before calling switch_pos, but it is not working since sometimes you swap two numbers like:

11 9 15 9 <= here the 11 and 15 are swapped, but the two 9's will never be swapped <=> compared.I mean I could run it again with the array_order on the first parameter position, but this would increase my runtime enormously!