Compilare: main.cpp: In function 'void calcul(int)': main.cpp:32:24: warning: array subscript has type 'char' [-Wchar-subscripts] while(k1>0&&pr[s[i]]<=pr[st1[k1]]) ^ main.cpp:32:37: warning: array subscript has type 'char' [-Wchar-subscripts] while(k1>0&&pr[s[i]]<=pr[st1[k1]]) ^ main.cpp: In function 'long long int op(char, long long int, long long int)': main.cpp:29:1: warning: control reaches end of non-void function [-Wreturn-type] } ^