Compilare: main.cpp: In function 'int main()': main.cpp:45:45: warning: array subscript has type 'char' [-Wchar-subscripts] while(vf1>0&&pr[st1[vf1]]>=pr[s[i]]){ ^ main.cpp:45:55: warning: array subscript has type 'char' [-Wchar-subscripts] while(vf1>0&&pr[st1[vf1]]>=pr[s[i]]){ ^ main.cpp: In function 'int calcul(int, int, char)': main.cpp:14:1: warning: control reaches end of non-void function [-Wreturn-type] } ^