delta4d/menu.c

## menu.c
#include <ncurses.h>
#include <string.h>

char menus[10][100];

int read_menu() {
    int n = 0;
    char *p = NULL;
    while (fgets(menus[n], sizeof(*menus), stdin)) {
        if (p = strchr(menus[n], '\n')) *p = '\0';
        ++n;
    }
    return n;
}

void print_menu(int cur, int const n) {
    int i = 0;
    for (i=0; i<n; ++i) {
        if (i == cur) attron(A_REVERSE);
        mvaddstr(i, 0, menus[i]);
        if (i == cur) attroff(A_REVERSE);
    }
    refresh();
}

int main(int argc, char **argv) {
    int n = read_menu();
    int cur = 0;
    int ch = 'A';

    initscr();
    noecho();
    cbreak();
    keypad(stdscr, TRUE);

    print_menu(cur, n);

    mvprintw(n, 0, "First: %d\n", ch); // 65

    while (true) {
        ch = getch();

        if (ch == KEY_UP || ch == 'k') --cur;
        else if (ch == KEY_DOWN || ch == 'j') ++cur;

        cur = (cur + n) % n;

        print_menu(cur, n);

        mvprintw(n+1, 0, "%d\n", ch); // -1
    }

    endwin();

    return 0;
}