Compilare: user.cpp: In function ‘int main()’: user.cpp:11:11: warning: unused variable ‘i’ [-Wunused-variable] int n,i,j,m,elim=0,nr=0,x=20000000,t; ^ user.cpp:14:10: warning: unused variable ‘este’ [-Wunused-variable] bool este=0; ^ user.cpp:48:18: warning: ‘col’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<lin<<" "<<col<<" "<<x<<" "<<elim<<"\n"; ^ user.cpp:48:8: warning: ‘lin’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<lin<<" "<<col<<" "<<x<<" "<<elim<<"\n"; ^