Compilare: main.c: In function 'readSpace': main.c:9:11: warning: array subscript has type 'char' [-Wchar-subscripts] 9 | while( s[i] == ' ' ) | ^ main.c: In function 'factor': main.c:17:8: warning: array subscript has type 'char' [-Wchar-subscripts] 17 | if( s[i] == '(' ) { | ^ main.c:28:13: warning: array subscript has type 'char' [-Wchar-subscripts] 28 | else if( s[i] == 'T' && s[i+1] == 'R' ) { | ^ main.c:33:13: warning: array subscript has type 'char' [-Wchar-subscripts] 33 | else if( s[i] == 'F' && s[i+1] == 'A' ) { | ^ main.c:39:11: warning: array subscript has type 'char' [-Wchar-subscripts] 39 | nr = s[i] - 'A'; | ^ main.c: In function 'calcNot': main.c:48:8: warning: array subscript has type 'char' [-Wchar-subscripts] 48 | if( s[i] == 'N' && s[i+1] == 'O' ) { | ^ main.c: In function 'calcAnd': main.c:65:11: warning: array subscript has type 'char' [-Wchar-subscripts] 65 | while( s[i] == 'A' && s[i+1] == 'N' ) { | ^ main.c: In function 'calcOr': main.c:78:11: warning: array subscript has type 'char' [-Wchar-subscripts] 78 | while( s[i] == 'O' && s[i+1] == 'R' ) { | ^