C 语言联系人管理系统

2024年8月28日 | 阅读 15 分钟

这个 C 语言联系人管理系统项目是用 C 语言编写的，是一个控制台应用程序。该系统是在 Code::Blocks IDE 中使用 GCC 编译器构建的，是一个简单的副项目。联系人管理系统控制台软件是一个没有图形的简单工具。

类似于移动设备上的联系人管理方式。你可以在这个项目中添加、查看、编辑、搜索和删除联系人。添加或修改的每条记录都会保存在一个文件中。C 语言联系人管理系统是一个简单的项目，适合初学者学习如何在 C 语言中创建 Web 项目。我们将提供 C 语言项目的完整源代码，以便你可以快速将其安装到计算机上并开始学习 C 语言编程。

联系人管理系统的基础是创建联系人的个人或组织记录、添加此数据并更新它的理念。在这里，用户可以安全、快速地添加他们的联系信息。该系统使得维护每个人的记录变得容易。整个项目都是使用“C”编程语言和各种变量和字符串开发的。消费者会发现这个小程序易于使用和理解。它是一个在 C 语言中创建的简单终端程序，没有使用任何视觉元素。

关于系统

通过输入姓名、电话、地址和电子邮件等详细信息来添加新联系人。
显示所有联系人：显示文件中存储的每个联系人的信息列表。
可以使用姓名和电话号码搜索联系人。
编辑联系人：添加联系人时，可以更改姓名、电话号码、地址和电子邮件。
通过从文件中删除联系人来删除联系人。
通过输入姓名、电话、地址和电子邮件等详细信息来添加新联系人。
命名每个联系人：将文件中的每个联系人及其个人联系信息包括在内。
可以使用姓名和电话号码搜索联系人。
编辑联系人：添加联系人时，可以更改姓名、电话号码、地址和电子邮件。
通过从文件中删除联系人来删除联系人。

程序分解

struct contact
{
	long ph ;
	char name [ 20 ] , add [ 20 ] , email [ 30 ] ;
} list ;

为我们的联系人列表创建了一个结构体。

system ( " cls " ) ; / * * * * * * * * Main menu * * * * * * * * * * * /

	printf ( " \ n \ t * * * * Welcome to Contact Management System * * * * " ) ;

	printf ( " \ n \ n \ n \ t \ t \ t MAIN MENU \ n \ t \ t = = = = = = = = = =\ n \ t \ t [ 1 ] Add a new Contact \ n \ t \ t [ 2 ] List all Contacts \ n \ t \ t [ 3 ] Search for contact \ n \ t \ t [ 4 ] Edit a Contact \ n \ t \ t [ 5 ] Delete a Contact \ n \ t \ t [ 0 ] Exit \ n \ t \ t = = = = = = = = = = = = \ n \ t \ t " ) ;
	printf ( " Enter the choice : " ) ;
	scanf ( " % d " , &ch ) ;

驱动代码类似于上面的代码，它将显示 C 语言联系人管理系统的主菜单，其中包含添加新联系人、列出所有联系人、搜索联系人、编辑联系人、删除联系人和退出等选项。

case 1 :
		system ( " cls " ) ;
		fp = fopen ( " contact . dll " , " a " ) ;
		for ( ; ; ) 
		{
			fflush ( stdin ) ;
			printf ( " To exit enter blank space in the name input \ n Name ( Use identical ) : " ) ;
			scanf ( " % [ ^ \ n ] " , & list . name ) ;
			if ( stricmp ( list . name , " " ) = = 0 | | stricmp ( list . name , " " ) = = 0 )
				break ;
			fflush ( stdin ) ;
			printf ( " Phone : " ) ;
			scanf ( " % l d " , & list . ph ) ;
			fflush ( stdi ) ;
			printf ( " address : " ) ;
			scanf ( " % [ ^ \ n ] " , & list . add ) ;
			fflush ( stdin ) ;
			printf ( " email address : " ) ;
			gets ( list . email ) ;
			printf ( " \ n " ) ;
			fwrite ( & list , sizeof ( list ) , 1 , fp ) ;
		}
		fclose ( fp ) ;
		break ;

如果用户选择了选项 1，即添加联系人，则上面的代码将生效。

case 2 :
		system ( " cls " ) ;
		printf ( " \ n \ t \ t = = = = = = = = = = = = = = = \ n \ t \ t \ t LIST OF CONTACTS \ n \ t \ t = = = = = = = = = = = = = = = \ n \ n Name \ t \ t Phone No \ t Address \ t \ t E-mail ad.\n= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = \ n \ n " ) ;
		for ( i = 97 ; i < = 122 ; i = i + 1 )
		{
			fp = fopen ( " contact . dll " , " r " ) ;
			fflush ( stdin ) ;
			found = 0 ;
			while ( fread ( & list , sizeof ( list ) , 1 , fp ) = = 1 )
			{
				if ( list . name [ 0 ] = = i | | list . name [ 0 ] = = i - 32 )
				{
					printf ( " \ n Name \ t : % s \ n Phone \ t : % l d \ n Address \ t : % s \ n Email \ t : % s \ n " , list . name ,
						   list . ph , list . add , list . email ) ;
					found + + ;
				}
			}
			if ( found ! = 0 )
			{
printf ( " = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = [ % c ] - ( % d ) \ n \ n", i - 32 , found ) ;
				getch ( ) ;
			}
			fclose ( fp ) ;
		}
		break ;

上面的代码用于显示用户输入的联系人列表。

case 3 :
		system ( " cls " ) ;
		do
		{
			found = 0 ;
			printf ( " \ n \ n \ t . . : : CONTACT SEARCH \ n \ t = = = = = = = = = = = = = = = = \ n \ t . . : : Name of contact to search : " ) ;
			fflush ( stdin ) ;
			scanf ( " % [ ^ \ n ] " , & query ) ;
			l = strlen ( query ) ;
			fp = fopen ( " contact . dll " , " r " ) ;
			system ( " cls " ) ;
			printf ( " \ n \ n . . : : Search result for ' % s ' \ n = = = = = = = = = = = = = = = = = = = = = = = = = = \ n " , query ) ;
			while ( fread ( & list , sizeof ( list ) , 1 , fp ) = = 1 )
			{
				for ( i = 0 ; i < = l ; i + + )
					name [ i ] = list . name [ i ] ;
				name [ l ] = ' \ 0 ' ;
				if ( stricmp ( name , query ) = = 0 )
				{
					printf ( " \ n . . : : Name \ t : % s \ n . . : : Phone \ t : % l d \ n . . : : Address \ t : % s \ n . . : : Email \ t :  % s \ n " , list . name , list . ph , list . add , list . email ) ;
					found + + ;
					if ( found % 4 = = 0 )
					{
						printf ( " . . : : Press any key to continue... " ) ;
						getch ( ) ; 
					}
				}
			}
			if ( found = = 0 )
				printf ( " \ n . . : : No match found! " ) ;
			else
				printf ( " \ n . . : : % d match ( s ) found ! " , found ) ;
			fclose ( fp ) ;
			printf ( " \ n . . : : Try again ? \ n \ n \ t [ 1 ] Yes \ t \ t [ 0 ] No \ n \ t " ) ;
			scanf ( " % d " , & ch ) ;
		} while ( ch = = 1 ) ;
		break ;

如果用户想搜索联系人，则上面的代码将生效。

case 4 :
		system ( " cls " ) ;

		fp = fopen ( " contact . dll " , " r " ) ;

		ft = fopen ( " temp . dat " , " w " ) ;

		fflush ( stdin ) ;

		printf ( " . . : : Edit contact \ n = = = = = = = = = = = = = = = = = = = = = \ n \ n \ t . . : : Enter the name of contact to edit : " ) ;

		scanf ( " % [ ^ \ n ] " , name ) ;

		while ( fread ( & list , sizeof ( list ) , 1 , fp ) = = 1 )

		{

			if ( stricmp ( name , list . name ) ! = 0 )

				fwrite ( & list , sizeof ( list ) , 1 , ft ) ;
		}

		fflush ( stdin ) ;

		printf ( " \ n \ n . . : : Editing ' % s ' \ n \ n " ,  name ) ;

		printf ( " . . : : Name ( Use identical ) : " ) ;

		scanf ( " % [ ^ \ n ] " , & list . name ) ;

		fflush ( stdin ) ;

		printf ( " . . : : Phone : " ) ;

		scanf ( " % l d " , & list . ph ) ;

		fflush ( stdin ) ;

		printf ( " . . : : address : " ) ;

		scanf ( " % [ ^ \ n ] " , & list . add ) ;

		fflush ( stdin ) ;

		printf ( " . . : : email address : " ) ;

		gets ( list . email ) ;

		printf ( " \ n " ) ;

		fwrite ( & list , sizeof ( list ) , 1 , ft ) ;

		fclose ( fp ) ;

		fclose ( ft ) ;

		remove ( " contact . dll " ) ;

		rename ( " temp . dat " , " contact . dll " ) ;

		break ;

如果用户想编辑现有联系人，则上面的代码将生效。

case 5 :
		system ( " cls " ) ;
		fflush ( stdin ) ;
		printf ( " \ n \ n \ t . . : : DELETE A CONTACT \ n \ t = = = = = = = = = = = = = = = = \ n \ t . . : : Enter the name of contact to delete : " ) ;
		scanf ( " % [ ^ \ n ] " , & name ) ;
		fp = fopen ( " contact . dll " , " r " ) ;
		ft = fopen ( " temp . dat " , " w " ) ;
		while ( fread ( & list , sizeof ( list ) , 1 , fp ) ! = 0 )
			if ( stricmp ( name , list . name ) ! = 0 )
				fwrite ( & list , sizeof ( list ) , 1 , ft ) ;
		fclose ( fp ) ;
		fclose ( ft ) ;
		remove ( " contact . dll " ) ;
		rename ( " temp . dat " , " contact . dll " ) ;
		break ;
	default :
		printf ( " Invalid choice " ) ;
		break ;
	}
	printf ( " \ n \ n \ n . . : : Enter the Choice : \ n \ n \ t [ 1 ] Main Menu \ t \ t [ 0 ] Exit \ n " ) ;
	scanf ( " % d " , & ch ) ;
	switch ( ch )
	{
	case 1 :
		goto main ;
	case 0 :
		break ;
	default :
		printf ( " Invalid choice " ) ;
		break ;
	} 
	return 0 ;
}

如果用户想从列表中删除联系人，则上面的代码将生效。