Compilare: user.cpp: In function ‘int bsearch(int, int, char)’: user.cpp:46:12: warning: unused variable ‘n’ [-Wunused-variable] int m, n = u; ^ user.cpp: In function ‘int main()’: user.cpp:99:8: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] int p=0; ^