Compilare: main.cpp: In function 'void lee()': main.cpp:227:25: warning: unused variable 'in' [-Wunused-variable] int k1, k2, k3, k4, in, jn, fn; ^~ main.cpp:227:29: warning: unused variable 'jn' [-Wunused-variable] int k1, k2, k3, k4, in, jn, fn; ^~ main.cpp:227:33: warning: unused variable 'fn' [-Wunused-variable] int k1, k2, k3, k4, in, jn, fn; ^~