Compilare: main.cpp: In function 'int main()': main.cpp:58:38: warning: array subscript has type 'char' [-Wchar-subscripts] while(prioritate[st.top()] >= prioritate[s[i]]) { //eliminam semnele cu prioritate mai mare sau egala ^ main.cpp:58:58: warning: array subscript has type 'char' [-Wchar-subscripts] while(prioritate[st.top()] >= prioritate[s[i]]) { //eliminam semnele cu prioritate mai mare sau egala ^ main.cpp:59:39: warning: array subscript has type 'char' [-Wchar-subscripts] fp[++q] = val[st.top()]; ^ main.cpp:67:39: warning: array subscript has type 'char' [-Wchar-subscripts] fp[++q] = val[st.top()]; ^