Compilare: user.c: In function ‘quicksort’: user.c:17:23: warning: unused variable ‘t’ [-Wunused-variable] int pivot,j,i,aux,t; ^ user.c: In function ‘main’: user.c:46:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("order2.in","r",stdin); ^ user.c:47:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("order2.out","w",stdout); ^ user.c:48:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.c:51:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^