Compilare: user.cpp:14:32: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] char* op[] = {"|", "&", "!", ""}; ^ user.cpp:14:32: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] user.cpp:14:32: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] user.cpp:14:32: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] user.cpp: In function ‘int eval(int, char, int)’: user.cpp:80:1: warning: control reaches end of non-void function [-Wreturn-type] } ^