Compilare: user.cpp: In function ‘long int search_exact(long int, long int)’: user.cpp:82: warning: control reaches end of non-void function user.cpp: In function ‘long int search_greater(long int, long int)’: user.cpp:73: warning: control reaches end of non-void function user.cpp: In function ‘long int search_less(long int, long int)’: user.cpp:66: warning: control reaches end of non-void function