Compilare: main.cpp: In member function 'void Function::buildPostfix(char*&)': main.cpp:86:71: warning: array subscript has type 'char' [-Wchar-subscripts] while(!s.empty() && priorities[s.top()]>=priorities[*p] && s.top()!=*p) ^ main.cpp: In function 'int main()': main.cpp:162:23: warning: array subscript is above array bounds [-Warray-bounds] priorities['~']=3; ~~~~~~~~~~~~~~^ main.cpp:168:18: warning: array subscript is above array bounds [-Warray-bounds] arity['~']=1; ~~~~~~~~~^