Compilare: user.cpp: In function ‘int cb1(long double, long double)’: user.cpp:34:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int cb2(long double, long double)’: user.cpp:39:9: warning: ‘mid’ may be used uninitialized in this function [-Wmaybe-uninitialized] int mid; ^