Compilare: main.cpp: In function 'int main()': main.cpp:95:23: warning: array subscript has type 'char' [-Wchar-subscripts] 95 | else if(pr[s[i]]!=0) | ~~~^ main.cpp:97:46: warning: array subscript has type 'char' [-Wchar-subscripts] 97 | while(op.empty()==false && pr[s[i]]<pr[op.back()]) | ~~~^ main.cpp:97:59: warning: array subscript has type 'char' [-Wchar-subscripts] 97 | while(op.empty()==false && pr[s[i]]<pr[op.back()]) | ~~~~~~~^~