Compilare: user.c: In function ‘main’: user.c:5:27: warning: unused variable ‘z’ [-Wunused-variable] int n,i,j,ii,jj,x,y=1,z; ^ user.c:5:23: warning: unused variable ‘y’ [-Wunused-variable] int n,i,j,ii,jj,x,y=1,z; ^ user.c:6:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("bile6.in","r",stdin); ^ user.c:7:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("bile6.out","w",stdout); ^ user.c:8:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^