Classic Quick Sort

1____void my_qsort(int* a, int N) {
2__________if (N <= 1) return;
3__________int l = 0;
4__________for (int i=1; i<N; i++)
5________________if (a[i] < a[0]) swap(a[++l], a[i]);
6__________swap(a[0], a[l]);
7__________my_qsort(a, l);
8__________my_qsort(a+l+1, N-l-1);
9____}