Compilare: user.cpp: In function ‘void read()’: user.cpp:11:11: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin>>S+1; ^ user.cpp: In function ‘void solve()’: user.cpp:63:52: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(pr[signs[nrsgn]]>=pr[S[i]]) ^ user.cpp: In function ‘int calcul(int, int, char)’: user.cpp:23:1: warning: control reaches end of non-void function [-Wreturn-type] } ^