Compilare: user.c: In function ‘num’: user.c:21:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(sir[p] == '-'){ ^ user.c:25:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(sir[p] >= '0' && sir[p] <= '9'){ ^ user.c:25:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:27:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr += sir[p] - '0'; ^ user.c: In function ‘med’: user.c:59:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(sir[p] != ']'){ ^ user.c:61:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(sir[p] != ']') ^ user.c: In function ‘subsecv’: user.c:71:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(sir[p] != ')'){ ^ user.c:73:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(sir[p] != ')') ^ user.c: In function ‘term’: user.c:88:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(sir[p] == '('){ ^ user.c:92:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(sir[p] == '['){ ^ user.c: In function ‘expr’: user.c:103:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] while((sir[p] >= '0' && sir[p] <= '9') || sir[p] == ',' || sir[p] == '(' || sir[p] == ')' || sir[p] == '[' || sir[p] == ']' || sir[p] == '-'){ ^ user.c:103:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:103:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:103:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:103:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:103:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:103:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:103:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c: In function ‘main’: user.c:113:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(sir, MAXN + 1, in); ^