main.c

这是一个由C语言开发的电话本程序,很有参考价值.

#include "main.h"

/*
  ==================================================
=============================
 	Author:		Hammer, May 2002, For www.cprogramming.com/cboard/
 	File:		main.c
 	Contents:	Global variables
 				main
  ==================================================
=============================
*/

/*
  ==================================================
=============================
 	The following are the only global variables
  ==================================================
=============================
*/
int 	gl_HighestID;
struct 	appdata gl_AppData;
struct 	appconfig gl_AppCfg;

/*
  ==================================================
=============================
    Function: 	main
    Args: 		From command line.  
    			- This can be empty.  In this case an interactive menu is loaded.
    			- or if present, it is taken to represent search criteria.  
    			In this case, the database is loaded, searched and the 
    			relevant records displayed, then the application terminates.
    Returns: 	An int of course! (Always 0)     Don't void your main!  
  ==================================================
=============================
 */
int main(int argc, char *argv[])
{	
	struct Node *tmpListPtr;
	int i;

	/*
	 * Load and setup app config
	 */
	memset (&gl_AppData, 0, sizeof(struct appdata));
	memset (&gl_AppCfg, 0, sizeof(struct appconfig));
	
	io_LoadAppConfig();
	
	if (gl_AppCfg.LinesPerDisplay <= 0 || gl_AppCfg.LinesPerDisplay > MAX_LINES_PER_PAGE)
		gl_AppCfg.LinesPerDisplay = DEF_LINES_PER_PAGE;
	
	/*
	 * Create and load the link list of Record structs
	 */
	gl_AppData.MainList = li_Create();	
	
	if ((tmpListPtr = io_LoadPhoneBookFromFile(gl_AppData.MainList)) == NULL)
		printf("No data loaded from phone book.\n");
	else gl_AppData.MainList = tmpListPtr;
	
	/*
	 * If we have command line args, use them as search criteria, then terminate
	 */
	if (argc > 1)
	{
		gl_AppData.SearchField = RECF_NAME;
		for (i = 1; i < argc; i++)
		{
			strncpy(gl_AppData.SearchText, argv[i], MAXL_NAME+1);
			(void)li_Traverse (gl_AppData.MainList, rec_SearchAndPrint);
		}
		(void)li_Traverse (gl_AppData.MainList, free);
		(void)li_Destroy (gl_AppData.MainList);
		return (0);
	}
	
	/*
	 * Start interactive session, go into menu display until the user exits
	 */
	printf ("---> Auto-Save is %s <---\n", (gl_AppCfg.AutoSave)?"On":"Off");
	ui_DisplayMenu(MainMenu);
	
	/*
	 * Check if we need to save changes, then destory the memory we alloc'd earlier
	 */
	if (gl_AppData.DataChanged)
	{
		ui_Save(NULL);
	}
	
	(void)li_Traverse (gl_AppData.MainList, free);
	
	(void)li_Destroy (gl_AppData.MainList);
	
	/*
	 * Finally save the app config for next time
	 */
	io_SaveAppConfig();
	
	return (0);
}