Compilare: user.cpp: In function ‘void read()’: user.cpp:30:5: warning: unused variable ‘mi’ [-Wunused-variable] int mi , ma; ^ user.cpp:30:10: warning: unused variable ‘ma’ [-Wunused-variable] int mi , ma; ^ user.cpp: In function ‘int main()’: user.cpp:42:13: warning: unused variable ‘j’ [-Wunused-variable] int i , j; ^