Compilare: user.c: In function ‘expresie’: user.c:18:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] while ( s[ p ] == 'm' || s[ p ] == 'M' ){ ^ user.c:18:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:19:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( s [ p ] == 'm' ){ ^ user.c: In function ‘factor’: user.c:33:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( s[ p ] == '(' ){ ^ user.c:39:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] while ( s[ p ] >= '0' && s[ p ] <= '9' ){ ^ user.c:39:5: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:41:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] x += s[ p ] - '0'; ^