Compilare: user.cpp: In function ‘int main()’: user.cpp:22:12: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin >>s+1; ^ user.cpp:69:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(vf>0&&pr[s[i]]<=pr[op[vf]]) ^ user.cpp:69:45: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(vf>0&&pr[s[i]]<=pr[op[vf]]) ^ user.cpp: In function ‘int calcul(char, int, int)’: user.cpp:19:1: warning: control reaches end of non-void function [-Wreturn-type] } ^