Compilare: user.cpp: In function ‘int main()’: user.cpp:21:13: warning: unused variable ‘x’ [-Wunused-variable] int l,c,x,y,l1,c1,s; ^ user.cpp:21:15: warning: unused variable ‘y’ [-Wunused-variable] int l,c,x,y,l1,c1,s; ^ user.cpp:21:17: warning: unused variable ‘l1’ [-Wunused-variable] int l,c,x,y,l1,c1,s; ^ user.cpp:21:20: warning: unused variable ‘c1’ [-Wunused-variable] int l,c,x,y,l1,c1,s; ^ user.cpp:21:23: warning: unused variable ‘s’ [-Wunused-variable] int l,c,x,y,l1,c1,s; ^