Compilare: user.cpp: In function ‘void Read()’: user.cpp:32:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[cit[1]]=0; ^ user.cpp:36:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[cit[1]]=val[cit[1]]*10+cit[po]-48; ^ user.cpp:36:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[cit[1]]=val[cit[1]]*10+cit[po]-48; ^ user.cpp: In function ‘int factor()’: user.cpp:93:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] rez=V[*p]; ^ user.cpp: In function ‘int calc()’: user.cpp:123:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] x[j]=val[sir[i]]; ^ /tmp/cc4B0hQy.o: In function `Read()': user.cpp:(.text+0x12e): warning: the `gets' function is dangerous and should not be used.