Compilare: user.cpp: In member function ‘int hash<tip>::hash_table(tip, int) [with tip = char*]’: user.cpp:50: warning: suggest parentheses around assignment used as truth value user.cpp:52: warning: suggest parentheses around ‘+’ in operand of ‘&’ user.cpp: In function ‘int main()’: user.cpp:113: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:108: warning: ‘x’ may be used uninitialized in this function