Why I don't get any output? Post: 302089084

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Top Forums Programming Why I don't get any output? Post 302089084 by jim mcnamara on Saturday 16th of September 2006 08:49:41 PM

09-16-2006

Registered User

You are confusing something called a "scanset" with what sscanf is doing in your example. A scanset is a CLASS of characters, for example, all lowercase:

Code:

/* sscanftest.c*/
int main()
{
	char	mystring[256];
	printf("Enter a string in lower case ");
	scanf("%[ a-z]",mystring); /* allow space character and all lc letters */
	printf("The string was ||%s||\n",mystring);
	return 0;
}

Here is what you get:

Quote:

$ sscanftest
Enter a string in lower case hello world
The string was ||hello world||
$ sscanftest
Enter a string in lower case hello, unix world
The string was ||hello||
$ sscanftest
Enter a string in lower case abcd1234
The string was ||abcd||
$

Notice:
1. the scanset does not look for a particular string like "model name"
scansets filter in (or out with ^ as the first character) desired characters.

2. it stops scanning when it hits a character not in the scanset - like the comma

In other words, sscanf does not do what you want it to do - look for a given string.
Your syntax should be "%[ <scanset goes here> ]".

Bottom line -- the strstr answer you already got works. scansets are not the
desired way to go here. HTH

jim mcnamara

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show_os_cursor

show_os_cursor(3alleg4) 					  Allegro manual					   show_os_cursor(3alleg4)

NAME

       show_os_cursor - Low level function to display the operating system cursor. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       int show_os_cursor(int cursor);

DESCRIPTION

       In  case you do not need Allegro's mouse cursor API, which automatically emulates a cursor in software if no other cursor is available, you
       can use this low level function to try to display or hide the system cursor directly.  The  cursor  parameter  takes  the  same	values	as
       select_mouse_cursor.  This function is very similar to calling enable_hardware_cursor, select_mouse_cursor and show_mouse, but will not try
       to do anything if no system cursor is available.

       The most common use for this function is to just call it once at the beginning of the program to tell  it  to  display  the  system  cursor
       inside  the Allegro window. The return value can be used to see if this succeeded or not. On some systems (e.g. DirectX fullscreen) this is
       not supported and the function will always fail, and in other cases only some of the cursors will  work,  or  in  the  case  of	MOUSE_CUR-
       SOR_ALLEGRO, only certain bitmap sizes may be supported.

       You  never  should  use	show_os_cursor	together  with	the  function  show_mouse  and	other functions affecting it (select_mouse_cursor,
       enable_hardware_cursor, disable_hardware_cursor, scare_mouse, unscare_mouse). They implement the standard high level mouse API,	and  don't
       work together with this low level function.

RETURN VALUE

       Returns 0 if a system cursor is being displayed after the function returns, or -1 otherwise.

SEE ALSO

       show_mouse(3alleg4), set_mouse_cursor_bitmap(3alleg4), select_mouse_cursor(3alleg4)

Allegro 							   version 4.4.2					   show_os_cursor(3alleg4)