Compilare: main.cpp: In function 'int main()': main.cpp:41:25: warning: array subscript has type 'char' [-Wchar-subscripts] 41 | if(imp[sir[i]]) | ~~~~~^ main.cpp:43:52: warning: array subscript has type 'char' [-Wchar-subscripts] 43 | while(!semn.empty() && imp[semn.top()]>=imp[sir[i]]) | ~~~~~~~~^~ main.cpp:43:66: warning: array subscript has type 'char' [-Wchar-subscripts] 43 | while(!semn.empty() && imp[semn.top()]>=imp[sir[i]]) | ~~~~~^ main.cpp:45:53: warning: array subscript has type 'char' [-Wchar-subscripts] 45 | numar[++numar[0]]=-care[semn.top()]; | ~~~~~~~~^~ main.cpp:57:57: warning: array subscript has type 'char' [-Wchar-subscripts] 57 | numar[++numar[0]]=-care[semn.top()]; | ~~~~~~~~^~ main.cpp:65:41: warning: array subscript has type 'char' [-Wchar-subscripts] 65 | numar[++numar[0]]=-care[semn.top()]; | ~~~~~~~~^~