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I am trying to use dialog.hin my C program. For this I looked up the manual (man 3 dialog) and used the example code, which they have provided. This is how my C program look like (it is called main.c):

#include <dialog.h>

int main(void)
{
  int status;
  init_dialog(stdin, stdout);
  status = dialog_yesno(
    "Hello, in dialog-format",
    "Hello World!",
    0, 0);
  end_dialog();
  return status;
}

After research I figured out, that the dialog program is based on ncurses. So I have installed both libraries, which contains the required header files.

I am working on Debian so: apt install dialog libncurses5-dev libncursesw5-dev

In the next step I have called the compiler, and I have also linked the libraries: gcc main.c -ldialog -lncurses

但是编译没有成功。

/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(util.o): In function `dlg_auto_size':
(.text+0x1a06): undefined reference to `sqrt'
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(trace.o): In function `dlg_trace_win':
(.text+0x29c): undefined reference to `win_wch'
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(trace.o): In function `dlg_trace_win':
(.text+0x2ab): undefined reference to `wunctrl'
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(arrows.o): In function `dlg_draw_arrows2':
(.text+0x2c4): undefined reference to `_nc_wacs'
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(arrows.o): In function `dlg_draw_arrows2':
(.text+0x2d6): undefined reference to `wadd_wch'
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(arrows.o): In function `dlg_draw_arrows2':
(.text+0x43c): undefined reference to `_nc_wacs'
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(arrows.o): In function `dlg_draw_arrows2':
(.text+0x44e): undefined reference to `wadd_wch'
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(arrows.o): In function `dlg_draw_scrollbar':
(.text+0x878): undefined reference to `_nc_wacs'
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(arrows.o): In function `dlg_draw_scrollbar':
(.text+0x88f): undefined reference to `wvline_set'
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(inputstr.o): In function `dlg_index_columns':
(.text+0x932): undefined reference to `setcchar'
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(inputstr.o): In function `dlg_index_columns':
(.text+0x93c): undefined reference to `wunctrl'
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/libdialog.a(ui_getc.o): In function `dlg_getc':
(.text+0x603): undefined reference to `wget_wch'
collect2: error: ld returned 1 exit status

After research I found out that the missing references to some functions like win_wch, wunctrl, etc. are all defined in curses.h.

Regarding to this post (What's the difference between -lcurses and -lncurses when compiling C using ncurses lib?) ncurses and curses are the same due curses is linked to ncurses.

But anyway, I have tried to compile with the curses library too: gcc main.c -lcurses -lncurses -ldialog. But it did not work either.

我想念什么？为什么编译失败？

如何在C程序中使用dialog.h