05-28-2017
I'm not sure if this is a rule. But I generally write the functions before i call them. Can you try putting panel() before execute() and run your code.
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LEARN ABOUT OPENDARWIN
panel_below
panel_above(3CURSES) Curses Library Functions panel_above(3CURSES)
NAME
panel_above, panel_below - panels deck traversal primitives
SYNOPSIS
cc [ flag ... ] file ... -lpanel -lcurses [ library .. ]
#include <panel.h>
PANEL *panel_above(PANEL *panel);
PANEL *panel_below(PANEL *panel);
DESCRIPTION
panel_above() returns a pointer to the panel just above panel, or NULL if panel is the top panel. panel_below() returns a pointer to the
panel just below panel, or NULL if panel is the bottom panel.
If NULL is passed for panel, panel_above() returns a pointer to the bottom panel in the deck, and panel_below() returns a pointer to the
top panel in the deck.
RETURN VALUES
NULL is returned if an error occurs.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|MT-Level |Unsafe |
+-----------------------------+-----------------------------+
SEE ALSO
curses(3CURSES), panels(3CURSES), attributes(5)
NOTES
These routines allow traversal of the deck of currently visible panels.
The header <panel.h> automatically includes the header <curses.h>.
SunOS 5.10 31 Dec 1996 panel_above(3CURSES)