Compilare: main.cpp: In function 'int numar()': main.cpp:36:26: warning: array subscript has type 'char' [-Wchar-subscripts] 36 | while ( !is_digit[ch = getch()] ); | ~~~^~~~~~~~~ main.cpp:39:27: warning: array subscript has type 'char' [-Wchar-subscripts] 39 | } while ( is_digit[ch = getch()] ); | ~~~^~~~~~~~~ main.cpp: In function 'void print_int(int)': main.cpp:65:9: warning: unused variable 'i' [-Wunused-variable] 65 | int i = 0; | ^