Compilare: main.cpp: In function 'int numar()': main.cpp:37:26: warning: array subscript has type 'char' [-Wchar-subscripts] 37 | while ( !is_digit[ch = getch()] ); | ~~~^~~~~~~~~ main.cpp:40:27: warning: array subscript has type 'char' [-Wchar-subscripts] 40 | } while ( is_digit[ch = getch()] ); | ~~~^~~~~~~~~ main.cpp: In function 'bool calc_mvc(int, int)': main.cpp:76:45: warning: suggest parentheses around assignment used as truth value [-Wparentheses] 76 | if ( is_mvc == true ) return mvc[cnt++] = node; | ~~~~~~~~~~~^~~~~~