C-Ncurses,窗口不显示/打印

您忘记调用刷新。

基本上,您确实在新创建的窗口上调用了刷新,但您忘记了刷新父窗口,因此它从未重新创建。

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

int main()
{
    WINDOW* my_win;
    int height = 10;
    int width = 40;
    int srtheight = 1;
    int srtwidth = 1;
    initscr();
    printw("first"); // added for relative positioning
    refresh();  //  need to draw the root window
                //  without this, apparently the children never draw
    my_win = newwin(height, width, 5, 5);
    box(my_win, 0, 0);  // added for easy viewing
    mvwprintw(my_win, height/2,width/2,"First line");
    wrefresh(my_win);
    getch();
    delwin(my_win);
    endwin();
    return 0;
}   

按您的预期显示窗口。

问题是 getch 刷新标准窗口 stdscr ,覆盖为执行的刷新 win 上一行。如果你打过电话 wgetch(win) 而不是这两条线,它会起作用。

这样地:

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


int main()
{
    initscr();
    WINDOW* win;
    int height = 10;
    int width = 40;
    int srtheight = 1;
    int srtwidth = 0;
    win = newwin(height, width, srtheight ,srtwidth);
    mvwprintw(win, height/2,width/2,"First line");
    /* wrefresh(win); */
    wgetch(win);
    delwin(win);
    endwin();


    return 0;
}

进一步阅读:

• Reading characters 例如。, wgetch

你需要打电话给 refresh() 之后 newwin() :

win = newwin(height, width, srtheight ,srtwidth);
refresh(); // <<<
mvwprintw(win, height/2,width/2,"First line");