Compilare: main.cpp: In function 'int numar()': main.cpp:35:26: warning: array subscript has type 'char' [-Wchar-subscripts] 35 | while ( !is_digit[ch = getch()] ); | ~~~^~~~~~~~~ main.cpp:38:27: warning: array subscript has type 'char' [-Wchar-subscripts] 38 | } while ( is_digit[ch = getch()] ); | ~~~^~~~~~~~~