Compilare: user.c: In function ‘main’: user.c:6:20: warning: unused variable ‘pas’ [-Wunused-variable] int i,n,nr,k,z,pas; ^ user.c:6:18: warning: unused variable ‘z’ [-Wunused-variable] int i,n,nr,k,z,pas; ^ user.c:6:13: warning: unused variable ‘nr’ [-Wunused-variable] int i,n,nr,k,z,pas; ^ user.c:8:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("tg.in","r",stdin); ^ user.c:9:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("tg.out","w",stdout); ^ user.c:10:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^