Compilare: user.cpp: In function ‘int main()’: user.cpp:13:17: warning: unused variable ‘s’ [-Wunused-variable] int v,n,l,u,s,i,j,st,dr,m; ^ user.cpp:13:21: warning: unused variable ‘j’ [-Wunused-variable] int v,n,l,u,s,i,j,st,dr,m; ^ user.cpp:31:15: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<m; ^