Compilare: user.cpp: In function ‘int main()’: user.cpp:20:17: warning: unused variable ‘l’ [-Wunused-variable] int l=0,i,j,k,ok; ^ user.cpp:20:25: warning: unused variable ‘k’ [-Wunused-variable] int l=0,i,j,k,ok; ^ user.cpp:20:27: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int l=0,i,j,k,ok; ^ user.cpp:9:15: warning: unused variable ‘j’ [-Wunused-variable] int p,n,i,j,k,st,dr; ^ user.cpp:9:17: warning: unused variable ‘k’ [-Wunused-variable] int p,n,i,j,k,st,dr; ^