Help C

[eternal flame]

int menu(void) {
    int menuOptLen = 3;
    int  menuOpt[] = {1, 2, 3};
    int k = -9999;

    while(elemNotInList(k, menuOpt, menuOptLen)) {
        system("clear");
    

    printf("=> " ANSI_COLOR_YELLOW  "MENU!"  ANSI_RESET_ALL "\n");
    printf("1.START\n");
    printf("2.LEAVE\n");
    printf("3.RESUME\n");;
    printf("=> " ANSI_COLOR_YELLOW  "\t\t\t Select an Option!"  ANSI_RESET_ALL "\n");    
        k = (int)(getc(stdin) - '0');
    }
return k;
}

can someone explain what is the function of k ? and exactly what is this row for? k = (int)(getc(stdin) - '0');

[still meadow]

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[hushed iron]

it's a bit dirty it reads the input, gets the char and removes '0' to get the actual number out

as '0' != 0

[still meadow]

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