Compilare: user.cpp: In function ‘int main()’: user.cpp:40:13: warning: unused variable ‘lo’ [-Wunused-variable] int lo = 1, hi = st, mid = 0,e = 0; ^ user.cpp:40:21: warning: unused variable ‘hi’ [-Wunused-variable] int lo = 1, hi = st, mid = 0,e = 0; ^ user.cpp:40:30: warning: unused variable ‘mid’ [-Wunused-variable] int lo = 1, hi = st, mid = 0,e = 0; ^ user.cpp:40:38: warning: unused variable ‘e’ [-Wunused-variable] int lo = 1, hi = st, mid = 0,e = 0; ^