better messages

code/ex_curses.c

@@ -5,8 +5,10 @@ int main(int argc, char *argv[])
 {
 int		key;
 
-if (2 != argc)	exit(1);
-
+if (2 != argc) {
+	fputs("need an argument\n", stderr);
+	exit(1);
+	}
 initscr();		/* first initialization */
 cbreak();		/* no line buffering */
 noecho();		/* be silent on input */
@@ -14,11 +16,9 @@ keypad(stdscr, TRUE);	/* acces touches curseur */
 
 mvaddstr(10, 3, argv[1]);
 refresh();
-
 key = getch();
-
 endwin();
-printf("code touche %d\n", key);
+printf("code touche  %d  0x%X\n", key, key);
 
 return 0;
 }