second language acquisition book

To implement an address book:Contacts can be used to store 1000 of people's information, and each person's information includes:Name, gender, age, phone, addressAvailable methods:1: Add contact information2: Delete the specified contact information3: Find specified contact information4: Modify the specified contact information5: Show All contact information6: Clear All Contacts#ifndef __contact_h_#define __contact_h_#define name_max 20#define sex_max 10#define tel_max 11#define ADDR_MAX 20# Defi

#include #include /*** Backup (copy) program for all file sizes* @author Mohui* @date 2015/04/10*/void Main (){FILE *sourcefile;FILE *backupfile;Char source[20],backup[20],ch;printf ("Please enter the name of the source file:\n");scanf ("%s", source);printf ("\ n");printf ("Please enter a name for the backup file:\n");scanf ("%s", backup);printf ("\ n");if ((Sourcefile=fopen (source, "R")) ==null){printf ("$ Error report:failed to open the source file!! \ n ");Exit (0);}if ((Backupfile=fopen (Ba