Compilare: user.c: In function ‘quicksort’: user.c:6:23: warning: unused variable ‘t’ [-Wunused-variable] int pivot,j,i,aux,t; ^ user.c: In function ‘main’: user.c:34:30: warning: unused variable ‘k’ [-Wunused-variable] int n,i,sum,j,d,z,s,nr=0,k; ^ user.c:34:25: warning: unused variable ‘nr’ [-Wunused-variable] int n,i,sum,j,d,z,s,nr=0,k; ^ user.c:34:23: warning: unused variable ‘s’ [-Wunused-variable] int n,i,sum,j,d,z,s,nr=0,k; ^ user.c:34:19: warning: unused variable ‘d’ [-Wunused-variable] int n,i,sum,j,d,z,s,nr=0,k; ^ user.c:35:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("nrtri.in","r",stdin); ^ user.c:36:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("nrtri.out","w",stdout); ^ user.c:37:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.c:39:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^