Compilare: main.cpp: In function 'bool eval(const Expresie&, int, int)': main.cpp:85:32: warning: array subscript has type 'char' [-Wchar-subscripts] return a.valori[a.s[st]]; ^ main.cpp: In function 'int main()': main.cpp:119:10: warning: unused variable 'x' [-Wunused-variable] char x = fin.get(); ^ main.cpp: In function 'bool eval(const Expresie&, int, int)': main.cpp:86:1: warning: control reaches end of non-void function [-Wreturn-type] } ^