Compilare: main.cpp: In function 'int lee(int)': main.cpp:4:11: warning: unused variable 'first' [-Wunused-variable] #define x first ^ main.cpp:44:13: note: in expansion of macro 'x' int x , y; ^ main.cpp:5:11: warning: unused variable 'second' [-Wunused-variable] #define y second ^ main.cpp:44:17: note: in expansion of macro 'y' int x , y; ^ main.cpp: In function 'void bin()': main.cpp:73:35: warning: for increment expression has no effect [-Wunused-value] for( int i = 1<<12 ; i > 0 ; i>>1 ) ~^~~