Compilare: user.cpp: In function ‘int bin(int)’: user.cpp:21:13: warning: unused variable ‘i’ [-Wunused-variable] for(int i = 1; step > 0; step /= 2) { ^ user.cpp:29:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int bin1(int)’: user.cpp:37:13: warning: unused variable ‘i’ [-Wunused-variable] for(int i = 1; step > 0; step /= 2) { ^ user.cpp:42:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int bin2(int)’: user.cpp:50:13: warning: unused variable ‘i’ [-Wunused-variable] for(int i = 1; step > 0; step /= 2) { ^ user.cpp:55:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^