The library management system of DOS interface is as follows
The program is divided into two parts: administrator operation (include books, delete books, etc.) and member operation (register, borrow books, return books, etc.);
1. Administrator operation interface
2. Member operation interface
global.h header :(only one written header file is used in the program, where all the interface functions and the required header files are stored, as well as the structure definition)
#include "iostream"
#include "string"
#include "fstream"
#include "conio.h" //getch();
#include "algorithm" //sort();
using namespace std;
#define Max_BookNum 10240 // Maximum number of books stored
#define Max_MemberNum 10240 // Maximum membership
typedef enum{// Book borrowing status
Borrowed=1, // Have been borrowing
available=0 // The current can borrow
}Book_Status;
typedef struct{// Book information
char name[20]; // Title:
char author[20]; // The author
string isbn; // Book number
string price; // The price
string pub; // Press.
string pubtime; // Publication date
string addtime; // Collection date
string Class; // Classification,
Book_Status Book_sta; // Borrowing status , Initialize as loanable
}Book_Message;
typedef struct{// Borrower information
string name; // The name
string sex; // gender
string number; // Student id
char login[20]; // Log in, In order to A1001 start
char code[20]; // The login password
Book_Message Borrow_Book[10]; // Maximum number of books available: 10 this
int BorBook_Cnt; // Number of books
}Member_Message;
void Show_WelMenu(); //Welcome The menu
void Book_InfoInput(); // Book information entry
void Book_InfoShow(Book_Message *Book_Info); // Output book information
void Book_Search(); // Search the book 0 By title; 1 According to the author
void Book_Delete(); // Delete book information
void Book_InfoChange(); // Modify book information
void Book_Sort(); // Book sorting
void Book_RecordSave(); // Book information saving
int Book_RecordLoad(); // Read the file
void Admin_Login(); // Administrator login
void Member_WelMenu(); // Member menu interface
void Book_WelMenu(); // Administrator menu interface
void Member_Login(); // Member login
void Member_Reg(); // Registered members
void Member_Bor(); // Borrow formalities
void Member_Ret(); // Return the book
void Member_Search(); // Membership information enquiry 0 By name; 1 According to the student id
void Member_Delete(); // Membership information cancellation
void Member_RecordSave();// Member information saving
int Member_RecordLoad();// Member information read file
void Member_InfoChange();
//void Member_BookMsgSave();
//int Member_BookMsgLoad();
void Member_MsgShow(Member_Message *Member_Msg);// Information display
void Member_CodeAdjust();// Member changes passwordMain program: main.c file:
#include "global.h"
int Book_Record=0;
int Member_Record=0;
Book_Message Book_List[Max_BookNum]; // Book registration form
Member_Message Member_List[Max_MemberNum]; // Membership form
int main()
{
char key[2];
while(1){
Show_WelMenu();
int cmd;
cin>>cmd;
if(!cmd)
Admin_Login(); // Enter the administrator login interface
else
Member_Login(); // Enter the member login interface
cout<<"\t\t\t\t Whether to exit the library management system ?\ty/n\n";
cin>>key;
if(strcmp(key,"y")==0)
break;
}
cout<<" The system is about to exit "<<endl;
getch();
return 0;
}The function implementation of each functional module is as follows:
1. Output interface (select the login interface)
void Show_WelMenu()
{
system("cls");
cout<<"\t\t\t\t Welcome to the library management system "<<endl<<endl;
cout<<"\t\t\t\t0 : administrator login "<<endl;
cout<<"\t\t\t\t1 : member login "<<endl;
}2. Administrator login program (the fixed password is selected here, and Init_Code is the initial password. You can also change your password.)
void Admin_Login()
{
short count=0;
char code[20];
char Init_Code[10]="0";
cout<<" Please enter the administrator password: "<<endl;
while(1){
cin>>code;
if(strcmp(code,Init_Code)==0){
break;
}
else{
cout<<" The password is wrong, please enter it again "<<endl;
count++;
if(count>3){
cout<<" Password error exceeds 3 Time, the program is about to exit "<<endl;
break;
}
}
}
Book_WelMenu(); //enter Admin Menu
}3. Member login procedure (use account password to log in, if there is no account, you can register by yourself)
void Member_Login()
{
Book_Record = 0;
Member_Record = 0;
Book_Record = Book_RecordLoad();
Member_Record = Member_RecordLoad(); // Reads the current registry from a file
char code[20],login[20],Req[2];
bool Login_Sta = false;
while(1){ // Login program, log out after success
if(Login_Sta) break;
if((Member_Record==0)){
cout << "\t\t\t\t The user library is empty, please register first " << endl;
cout << "\t\t\t\t Press any key to register ";
getch();
system("cls");
Member_Reg();
}
else{
cout << "\t\t\t\t Please enter your login number: " << endl;
cin>>login;
for(Mem_Point=0; Mem_Point<Member_Record; Mem_Point++){
if((strcmp(login,Member_List[Mem_Point].login) == 0)){
cout << "\t\t\t\t Please enter your password: " << endl;
cin >> code;
while(strcmp(code, Member_List[Mem_Point].code) != 0){
cout << " Password mistake , Please re-enter " << endl;
cin >> code;
}
Login_Sta = true;
cout << "\t\t\t\t Login successful , Press any key to continue ";
break;
}
}
if(Mem_Point >= Member_Record){
cout << "\t\t\t This user is not registered and cannot use the library management system " << endl;
cout << "\t\t\t\t Whether to register now ( Y/N ) " << endl;
cin >> Req;
if((strcmp(Req,"y") == 0) || (strcmp(Req,"Y") == 0))
Member_Reg();
}
}
}
getch();
system("cls");
Member_WelMenu();
getch();
}4. File operation (read in and write, only the file operation of the member information part is posted here, and the file operation of the book is similar)
/* Export the member registry to the file */
void Member_RecordSave()
{
ofstream outfile;
outfile.open("E:\\Course\\002\\Member_Info.txt",ios::ate|ios::out); // If you have a file, empty it before you write it
for(int i=0;i<Member_Record;i++){
outfile << Member_List[i].name <<" " << Member_List[i].sex <<" " << Member_List[i].number <<" "
<< Member_List[i].login <<" " << Member_List[i].code << endl;
}
outfile.close();
}
/* Import the member registry from the file */
int Member_RecordLoad()
{
int Member_FileLoad=0;
ifstream infile;
infile.open("E:\\Course\\002\\Member_Info.txt",ios::in);
string n,s,num;
char l[20],c[20];
while(1){
infile >> n >> s >> num >> l >> c; // Import the information from the file and register the membership information
Member_Add(n,s,num,l,c);
if(infile.eof() != 0)break;
Member_FileLoad++;
}
infile.close();
return Member_FileLoad;
}5, member registration procedures (first scan the registry, if the registration has been returned failed. To register is to add member information to the file.)
// Internal function
void Member_Add(string n,string s,string num,char* l,char* c)
{
Member_List[Member_Record].name = n;
Member_List[Member_Record].sex =s;
Member_List[Member_Record].number =num;
strcpy(Member_List[Member_Record].login,(const char*)l);
strcpy(Member_List[Member_Record].code,(const char*)c);
Member_Record++;
}
/* Membership registration procedure */
void Member_Reg()
{
string n,s,num;
char l[20],c[20],choice[2];
cout << "\t\t\t\t Registered members " << endl;
cout << "\t\t Please enter here Name, gender, student number, login number and password " << endl;
cin >> n >> s >> num >> l >> c;
for(int i=0; i<Member_Record; i++){
if(strcmp(Member_List[i].login,l) == 0){
cout << "\t\t\t\t The login number already exists. Registration failed " << endl;
getch();
system("cls");
return;
}
}
Member_Add(n,s,num,l,c);
cout << "\t\t\t\t Registered successfully " << endl;
cout << "\t\t\t\t Whether to file or not \ty/n?" << endl;;
cin >> choice;
if((strcmp(choice,"y")==0) || (strcmp(choice,"Y") == 0))
Member_RecordSave();
getch();
system("cls"); //clear screan
}6. Member logout and password modification
/* Membership information cancellation */
void Member_Delete()
{
bool key=false;
char Del_Name[20],cmd[2];
cout<<" Please enter the login number of the member you want to logout "<<endl;
cin>>Del_Name;
for(int i=0;i<Member_Record;i++){
if(strcmp(Member_List[i].login,Del_Name)==0){ //found
key=true;
Member_MsgShow(&Member_List[i]);
cout<<" Whether you need to delete this member ,y/n?"<<endl;
cin>>cmd;
if((strcmp(cmd,"y")==0)||(strcmp(cmd,"Y")==0)){ //ensure delete
while(i<=Member_Record-1){
Member_List[i]=Member_List[i+1];
i++;
}
Member_Record--;
Member_RecordSave();
cout<<" members "<<Del_Name<<" Has been cancelled "<<endl;
break;
}
}
}
if(!key) cout<<" The member was not found "<<endl;
}
void Member_CodeAdjust()
{
char TempCode[20],choice[2],Temp[20];
strcpy(Temp,Member_List[Mem_Point].code);
while(1){
cout<<" Please enter the original password: ";
cin>>TempCode;
if(strcmp(Temp,TempCode)==0){
cout<<" Please enter a new password: ";
cin>>TempCode;
cout<<" Please enter your new password again: ";
strcpy(Member_List[Mem_Point].code,TempCode);
cin>>TempCode;
if(strcmp(Member_List[Mem_Point].code,TempCode)==0){
cout<<"\t\t\t\t Password changed successfully, the new password is "<<Member_List[Mem_Point].code<<endl; //test
Member_RecordSave();
break;
}
else{
cout<<" The password entered twice is not 1 To you, the modification failed! "<<endl;
cout<<"\t\t\t\t The input Y Go ahead, enter N Give up to modify "<<endl;
cin>>choice;
if((strcmp(choice,"n")==0)||(strcmp(choice,"N")==0))
return ;
continue;
}
}
cout<<" Password error, please press any key to enter again! "<<endl;
getch();
}
}Administrator operation of most procedures and member operations are similar, here only posted a book sorting operation
7. Sorting books
/* Inner function for book sorting function call */
bool cmp( Book_Message a, Book_Message b ){
if(strcmp( a.author, b.author ) == 0)
return strcmp( a.name, b.name ) < 0;
return strcmp( a.author , b.author ) < 0;
}
/*
* @brief Books are sorted by author's name in ascending order, or by title in ascending order if the author is the same
* @param None
* @retval None
*/
void Book_Sort()
{
sort( Book_List, Book_List+Book_Record, cmp );
cout << " Sorting done " << endl;
cout << " All book information is as follows " << endl;
cout << " Title: \t The author \t The price \t Press. \t Publication date \t Classification, Serial number Collection date Could you borrow " << endl;
for(int i=0; i<Book_Record; i++){
Book_InfoShow( &Book_List[i] );
}
getch();
}