NCURSES - 如何识别在C中进行的选择

Question

我想用NCURSES制作一个简单的GUI。我正在使用C和Mac OS X作为操作系统。我有制作GUI的代码，带有一些“按钮”和高亮选择，可以用箭头键移动。这是代码：

#include <stdio.h>
#include <ncurses.h>

#define WIDTH 30
#define HEIGHT 10 

int startx = 0;
int starty = 0;

char *choices[] = { 
            "Choice 1",
            "Choice 2",
            "Choice 3",
            "Choice 4",
            "Exit",
          };
int n_choices = sizeof(choices) / sizeof(char *);
void print_menu(WINDOW *menu_win, int highlight);

int main()
{   WINDOW *menu_win;
    int highlight = 1;
    int choice = 0;
    int c;

    initscr();
    clear();
    noecho();
    cbreak();   /* Line buffering disabled. pass on everything */
    startx = (80 - WIDTH) / 2;
    starty = (24 - HEIGHT) / 2;

    menu_win = newwin(HEIGHT, WIDTH, starty, startx);
    keypad(menu_win, TRUE);
    mvprintw(0, 0, "Use arrow keys to go up and down, Press enter to select a choice");
    refresh();
    print_menu(menu_win, highlight);
    while(1)
    {   c = wgetch(menu_win);
        switch(c)
        {   case KEY_UP:
                if(highlight == 1)
                    highlight = n_choices;
                else
                    --highlight;
                break;
            case KEY_DOWN:
                if(highlight == n_choices)
                    highlight = 1;
                else 
                    ++highlight;
                break;
            case 10:
                choice = highlight;
                break;
            default:
                mvprintw(24, 0, "Charcter pressed is = %3d Hopefully it can be printed as '%c'", c, c);
                refresh();
                break;
        }
        print_menu(menu_win, highlight);
        if(choice != 0) /* User did a choice come out of the infinite loop */
            break;
    }   
    mvprintw(23, 0, "You chose choice %d with choice string %s\n", choice, choices[choice - 1]);
    clrtoeol();
    refresh();
    endwin();
    return 0;
}


void print_menu(WINDOW *menu_win, int highlight)
{
    int x, y, i;    

    x = 2;
    y = 2;
    box(menu_win, 0, 0);
    for(i = 0; i < n_choices; ++i)
    {   if(highlight == i + 1) /* High light the present choice */
        {   wattron(menu_win, A_REVERSE); 
            mvwprintw(menu_win, y, x, "%s", choices[i]);
            wattroff(menu_win, A_REVERSE);
        }
        else
            mvwprintw(menu_win, y, x, "%s", choices[i]);
        ++y;
    }
    wrefresh(menu_win);
} 

好的，代码完美无缺。我唯一的问题是如何识别用户选择的标签？我的意思是，我怎么知道他是否按下“选择1”或“选择2”等等？

我知道这是一个相当愚蠢的问题，但我是这个图书馆的新手，我无法弄明白。感谢您的阅读，希望您能帮助我！