Compilare: main.c: In function 'fact': main.c:8:8: warning: array subscript has type 'char' [-Wchar-subscripts] 8 | if (v[vi] == '(') { | ^ main.c:14:22: warning: array subscript has type 'char' [-Wchar-subscripts] 14 | while (vi < vl && v[vi] >= '0' && v[vi] <= '9') { | ^ main.c:14:38: warning: array subscript has type 'char' [-Wchar-subscripts] 14 | while (vi < vl && v[vi] >= '0' && v[vi] <= '9') { | ^ main.c:15:19: warning: array subscript has type 'char' [-Wchar-subscripts] 15 | x = x * 10 + v[vi] - '0'; | ^ main.c: In function 'minmax': main.c:27:22: warning: array subscript has type 'char' [-Wchar-subscripts] 27 | while (vi < vl && v[vi] != '\n') { | ^ main.c:28:13: warning: array subscript has type 'char' [-Wchar-subscripts] 28 | s = v[vi++]; | ~~^~ main.c:31:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 31 | if (s == 'm' && b < a || s == 'M' && b > a) | ~~~~~~~~~^~~~~~~~ main.c: In function 'main': main.c:39:7: warning: unused variable 'n' [-Wunused-variable] 39 | int n, i; | ^