Mini project "library management" in C programming

//list of header files
#include <windows.h>
#include<stdio.h>                   //contains printf,scanf etc
#include<conio.h>                   //contains delay(),getch(),gotoxy(),etc.
#include <stdlib.h>
#include<string.h>                  //contains strcmp(),strcpy(),strlen(),etc
#include<ctype.h>                   //contains toupper(), tolower(),etc
#include<dos.h>                     //contains _dos_getdate
#include<time.h>
//#include<bios.h>                   //contains  show_mouse();

#define RETURNTIME 15

//list of function prototype
char catagories[][15]={"Computer","Electronics","Electrical","Civil","Mechnnical","Architecture"};
void returnfunc(void);
void mainmenu(void);
void addbooks(void);
void deletebooks(void);
void editbooks(void);
void searchbooks(void);
void issuebooks(void);
void viewbooks(void);
void closeapplication(void);
int  getdata();
int  checkid(int);
int t(void);
//void show_mouse(void);
void Password();
void issuerecord();
void loaderanim();

COORD coord = {0, 0}; // sets coordinates to 0,0
//COORD max_buffer_size = GetLargestConsoleWindowSize(hOut);
COORD max_res,cursor_size;
void gotoxy (int x, int y)
{
        coord.X = x; coord.Y = y; // X and Y coordinates
        SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}
void delay(unsigned int mseconds)
{
    clock_t goal = mseconds + clock();
    while (goal > clock());
}
//list of global files that can be acceed form anywhere in program
FILE *fp,*ft,*fs;

//list of global variable
int s;
char findbook;
char password[10]={"pokhara"};


struct meroDate
{
    int mm,dd,yy;
};
struct books
{
    int id;
    char stname[20];
    char name[20];
    char Author[20];
    int quantity;
    float Price;
    int count;
    int rackno;
    char *cat;
    struct meroDate issued;
    struct meroDate duedate;
};
struct books a;
int main()

{
      Password();
      getch();
   return 0;

}
void mainmenu()
{
//loaderanim();
    system("cls");
       // textbackground(13);
int i;
gotoxy(20,3);
printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2 MAIN MENU \xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
//show_mouse();
gotoxy(20,5);
printf("\xDB\xDB\xDB\xDB\xB2 1. Add Books   ");
gotoxy(20,7);
printf("\xDB\xDB\xDB\xDB\xB2 2. Delete books");
gotoxy(20,9);
printf("\xDB\xDB\xDB\xDB\xB2 3. Search Books");
gotoxy(20,11);
printf("\xDB\xDB\xDB\xDB\xB2 4. Issue Books");
gotoxy(20,13);
printf("\xDB\xDB\xDB\xDB\xB2 5. View Book list");
gotoxy(20,15);
printf("\xDB\xDB\xDB\xDB\xB2 6. Edit Book's Record");
gotoxy(20,17);
printf("\xDB\xDB\xDB\xDB\xB2 7. Close Application");
gotoxy(20,19);
printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
gotoxy(20,20);
t();
gotoxy(20,21);
printf("Enter your choice:");
switch(getch())
{
case '1':
addbooks();
break;
case '2':
deletebooks();
break;
case '3':
searchbooks();
    break;
case '4':
issuebooks();
    break;
    case '5':
viewbooks();
break;
    case '6':
editbooks();
break;
    case '7':
    {
system("cls");
gotoxy(16,3);
printf("Programmers....");
gotoxy(16,4);
printf("1. Bibek Subedi       (066/BCT/506)");
gotoxy(16,5);
printf("   Mobile:9846311430  E-mail:subedi_bibek@yahoo.co.in");
gotoxy(16,7);
printf("2. Dinesh Subedi      (066/BCT/512)");
gotoxy(16,8);
printf("   Mobile:9841569394  E-mail:smokindinesh@gmail.com");
gotoxy(16,10);
printf("3. Sijan Bhandari      (066/BCT/537)");
gotoxy(16,11);
printf("   Mobile:9849516774   E-mail:sijan_nasa@yahoo.com");
gotoxy(16,13);
printf("With  the Unexplainable Help of Mr.Ashok Basnet");
gotoxy(10,17);
printf("Exiting in 3 second...........>");
//flushall();
delay(3000);
exit(0);
    }
    default:
{
gotoxy(10,23);
printf("\aWrong Entry!!Please re-entered correct option");
if(getch())
mainmenu();
}

    }
}
void addbooks(void)    //funtion that add books
{
system("cls");
int i;
gotoxy(20,5);
printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2SELECT CATEGOIES\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
gotoxy(20,7);
printf("\xDB\xDB\xDB\xDB\xB2 1. Computer");
gotoxy(20,9);
printf("\xDB\xDB\xDB\xDB\xB2 2. Electronics");
gotoxy(20,11);
printf("\xDB\xDB\xDB\xDB\xB2 3. Electrical");
gotoxy(20,13);
printf("\xDB\xDB\xDB\xDB\xB2 4. Civil");
gotoxy(20,15);
printf("\xDB\xDB\xDB\xDB\xB2 5. Mechanical");
gotoxy(20,17);
printf("\xDB\xDB\xDB\xDB\xB2 6. Architecture");
gotoxy(20,19);
printf("\xDB\xDB\xDB\xDB\xB2 7. Back to main menu");
gotoxy(20,21);
printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
gotoxy(20,22);
printf("Enter your choice:");
scanf("%d",&s);
if(s==7)

mainmenu() ;
system("cls");
fp=fopen("Bibek.dat","ab+");
if(getdata()==1)
{
a.cat=catagories[s-1];
fseek(fp,0,SEEK_END);
fwrite(&a,sizeof(a),1,fp);
fclose(fp);
gotoxy(21,14);
printf("The record is sucessfully saved");
gotoxy(21,15);
printf("Save any more?(Y / N):");
if(getch()=='n')
    mainmenu();
else
    system("cls");
    addbooks();
}
}
void deletebooks()    //function that delete items from file fp
{
    system("cls");
    int d;
    char another='y';
    while(another=='y')  //infinite loop
    {
system("cls");
gotoxy(10,5);
printf("Enter the Book ID to  delete:");
scanf("%d",&d);
fp=fopen("Bibek.dat","rb+");
rewind(fp);
while(fread(&a,sizeof(a),1,fp)==1)
{
    if(a.id==d)
    {

gotoxy(10,7);
printf("The book record is available");
gotoxy(10,8);
printf("Book name is %s",a.name);
gotoxy(10,9);
printf("Rack No. is %d",a.rackno);
findbook='t';
    }
}
if(findbook!='t')
{
    gotoxy(10,10);
    printf("No record is found modify the search");
    if(getch())
    mainmenu();
}
if(findbook=='t' )
{
    gotoxy(10,9);
    printf("Do you want to delete it?(Y/N):");
    if(getch()=='y')
    {
ft=fopen("test.dat","wb+");  //temporary file for delete
rewind(fp);
while(fread(&a,sizeof(a),1,fp)==1)
{
    if(a.id!=d)
    {
fseek(ft,0,SEEK_CUR);
fwrite(&a,sizeof(a),1,ft); //write all in tempory file except that
    }                              //we want to delete
}
fclose(ft);
fclose(fp);
remove("Bibek.dat");
rename("test.dat","Bibek.dat"); //copy all item from temporary file to fp except that
fp=fopen("Bibek.dat","rb+");    //we want to delete
if(findbook=='t')
{
    gotoxy(10,10);
    printf("The record is sucessfully deleted");
    gotoxy(10,11);
    printf("Delete another record?(Y/N)");
}
    }
else
mainmenu();
fflush(stdin);
another=getch();
}
}
    gotoxy(10,15);
    mainmenu();
}
void searchbooks()
{
    system("cls");
    int d;
    printf("*****************************Search Books*********************************");
    gotoxy(20,10);
    printf("\xDB\xDB\xDB\xB2 1. Search By ID");
    gotoxy(20,14);
    printf("\xDB\xDB\xDB\xB2 2. Search By Name");
    gotoxy( 15,20);
    printf("Enter Your Choice");
    fp=fopen("Bibek.dat","rb+"); //open file for reading propose
    rewind(fp);   //move pointer at the begining of file
    switch(getch())
    {
  case '1':
{
    system("cls");
    gotoxy(25,4);
    printf("****Search Books By Id****");
    gotoxy(20,5);
    printf("Enter the book id:");
    scanf("%d",&d);
    gotoxy(20,7);
    printf("Searching........");
    while(fread(&a,sizeof(a),1,fp)==1)
    {
if(a.id==d)
{
    delay(2);
    gotoxy(20,7);
    printf("The Book is available");
    gotoxy(20,8);
    printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
    gotoxy(20,9);
    printf("\xB2 ID:%d",a.id);gotoxy(47,9);printf("\xB2");
    gotoxy(20,10);
    printf("\xB2 Name:%s",a.name);gotoxy(47,10);printf("\xB2");
    gotoxy(20,11);
    printf("\xB2 Author:%s ",a.Author);gotoxy(47,11);printf("\xB2");
    gotoxy(20,12);
    printf("\xB2 Qantity:%d ",a.quantity);gotoxy(47,12);printf("\xB2"); gotoxy(47,11);printf("\xB2");
    gotoxy(20,13);
    printf("\xB2 Price:Rs.%.2f",a.Price);gotoxy(47,13);printf("\xB2");
    gotoxy(20,14);
    printf("\xB2 Rack No:%d ",a.rackno);gotoxy(47,14);printf("\xB2");
    gotoxy(20,15);
    printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
    findbook='t';
}

    }
    if(findbook!='t')  //checks whether conditiion enters inside loop or not
    {
    gotoxy(20,8);
    printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
    gotoxy(20,9);printf("\xB2");  gotoxy(38,9);printf("\xB2");
    gotoxy(20,10);
    printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
    gotoxy(22,9);printf("\aNo Record Found");
    }
    gotoxy(20,17);
    printf("Try another search?(Y/N)");
    if(getch()=='y')
    searchbooks();
    else
    mainmenu();
    break;
}
case '2':
{
    char s[15];
    system("cls");
    gotoxy(25,4);
    printf("****Search Books By Name****");
    gotoxy(20,5);
    printf("Enter Book Name:");
    scanf("%s",s);
    int d=0;
    while(fread(&a,sizeof(a),1,fp)==1)
    {
if(strcmp(a.name,(s))==0) //checks whether a.name is equal to s or not
{
    gotoxy(20,7);
    printf("The Book is available");
    gotoxy(20,8);
    printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
    gotoxy(20,9);
    printf("\xB2 ID:%d",a.id);gotoxy(47,9);printf("\xB2");
    gotoxy(20,10);
    printf("\xB2 Name:%s",a.name);gotoxy(47,10);printf("\xB2");
    gotoxy(20,11);
    printf("\xB2 Author:%s",a.Author);gotoxy(47,11);printf("\xB2");
    gotoxy(20,12);
    printf("\xB2 Qantity:%d",a.quantity);gotoxy(47,12);printf("\xB2");
    gotoxy(20,13);
    printf("\xB2 Price:Rs.%.2f",a.Price);gotoxy(47,13);printf("\xB2");
    gotoxy(20,14);
    printf("\xB2 Rack No:%d ",a.rackno);gotoxy(47,14);printf("\xB2");
    gotoxy(20,15);
    printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
    d++;
}

    }
    if(d==0)
    {
    gotoxy(20,8);
    printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
    gotoxy(20,9);printf("\xB2");  gotoxy(38,9);printf("\xB2");
    gotoxy(20,10);
    printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
    gotoxy(22,9);printf("\aNo Record Found");
    }
    gotoxy(20,17);
    printf("Try another search?(Y/N)");
    if(getch()=='y')
    searchbooks();
    else
    mainmenu();
    break;
}
default :
getch();
searchbooks();
    }
    fclose(fp);
}
void issuebooks(void)  //function that issue books from library
{
    int t;

    system("cls");
    printf("********************************ISSUE SECTION**************************");
    gotoxy(10,5);
    printf("\xDB\xDB\xDB\xDb\xB2 1. Issue a Book");
    gotoxy(10,7);
    printf("\xDB\xDB\xDB\xDb\xB2 2. View Issued Book");
    gotoxy(10,9);
    printf("\xDB\xDB\xDB\xDb\xB2 3. Search Issued Book");
    gotoxy(10,11);
    printf("\xDB\xDB\xDB\xDb\xB2 4. Remove Issued Book");
    gotoxy(10,14);
    printf("Enter a Choice:");
    switch(getch())
    {
case '1':  //issue book
{
system("cls");
int c=0;
char another='y';
while(another=='y')
{
system("cls");
gotoxy(15,4);
printf("***Issue Book section***");
gotoxy(10,6);
printf("Enter the Book Id:");
scanf("%d",&t);
fp=fopen("Bibek.dat","rb");
fs=fopen("Issue.dat","ab+");
if(checkid(t)==0) //issues those which are present in library
{
     gotoxy(10,8);
     printf("The book record is available");
     gotoxy(10,9);
     printf("There are %d unissued books in library ",a.quantity);
     gotoxy(10,10);
     printf("The name of book is %s",a.name);
     gotoxy(10,11);
     printf("Enter student name:");
     scanf("%s",a.stname);
    // struct dosdate_t d; //for current date
    // _dos_getdate(&d);
    // a.issued.dd=d.day;
    // a.issued.mm=d.month;
     //a.issued.yy=d.year;
     gotoxy(10,12);
     printf("Issued date=%d-%d-%d",a.issued.dd,a.issued.mm,a.issued.yy);
     gotoxy(10,13);
     printf("The BOOK of ID %d is issued",a.id);
     a.duedate.dd=a.issued.dd+RETURNTIME;   //for return date
     a.duedate.mm=a.issued.mm;
     a.duedate.yy=a.issued.yy;
     if(a.duedate.dd>30)
     {
a.duedate.mm+=a.duedate.dd/30;
a.duedate.dd-=30;

     }
     if(a.duedate.mm>12)
     {
a.duedate.yy+=a.duedate.mm/12;
a.duedate.mm-=12;

     }
     gotoxy(10,14);
     printf("To be return:%d-%d-%d",a.duedate.dd,a.duedate.mm,a.duedate.yy);
     fseek(fs,sizeof(a),SEEK_END);
     fwrite(&a,sizeof(a),1,fs);
     fclose(fs);
     c=1;
}
if(c==0)
{
gotoxy(10,11);
printf("No record found");
}
gotoxy(10,15);
printf("Issue any more(Y/N):");
fflush(stdin);
another=getche();
fclose(fp);
}

break;
}
case '2':  //show issued book list
{
system("cls");
int j=4;
printf("*******************************Issued book list*******************************\n");
gotoxy(2,2);
printf("STUDENT NAME    CATEGORY    ID    BOOK NAME    ISSUED DATE    RETURN DATE");
       fs=fopen("Issue.dat","rb");
while(fread(&a,sizeof(a),1,fs)==1)
{

gotoxy(2,j);
printf("%s",a.stname);
gotoxy(18,j);
printf("%s",a.cat);
gotoxy(30,j);
printf("%d",a.id);
gotoxy(36,j);
printf("%s",a.name);
gotoxy(51,j);
printf("%d-%d-%d",a.issued.dd,a.issued.mm,a.issued.yy );
gotoxy(65,j);
printf("%d-%d-%d",a.duedate.dd,a.duedate.mm,a.duedate.yy);
//struct dosdate_t d;
//_dos_getdate(&d);
gotoxy(50,25);
// printf("Current date=%d-%d-%d",d.day,d.month,d.year);
j++;

}
fclose(fs);
gotoxy(1,25);
returnfunc();
}
break;
case '3':   //search issued books by id
{
system("cls");
gotoxy(10,6);
printf("Enter Book ID:");
int p,c=0;
char another='y';
while(another=='y')
{

scanf("%d",&p);
fs=fopen("Issue.dat","rb");
while(fread(&a,sizeof(a),1,fs)==1)
{
if(a.id==p)
{
issuerecord();
gotoxy(10,12);
printf("Press any key.......");
getch();
issuerecord();
c=1;
}

}
fflush(stdin);
fclose(fs);
if(c==0)
{
gotoxy(10,8);
printf("No Record Found");
}
gotoxy(10,13);
printf("Try Another Search?(Y/N)");
another=getch();
}
}
break;
case '4':  //remove issued books from list
{
system("cls");
int b;
FILE *fg;  //declaration of temporary file for delete
char another='y';
while(another=='y')
{
gotoxy(10,5);
printf("Enter book id to remove:");
scanf("%d",&b);
fs=fopen("Issue.dat","rb+");
while(fread(&a,sizeof(a),1,fs)==1)
{
if(a.id==b)
{
issuerecord();
findbook='t';
}
if(findbook=='t')
{
gotoxy(10,12);
printf("Do You Want to Remove it?(Y/N)");
if(getch()=='y')
{
fg=fopen("record.dat","wb+");
rewind(fs);
while(fread(&a,sizeof(a),1,fs)==1)
{
if(a.id!=b)
{
fseek(fs,0,SEEK_CUR);
fwrite(&a,sizeof(a),1,fg);
}
}
fclose(fs);
fclose(fg);
remove("Issue.dat");
rename("record.dat","Issue.dat");
gotoxy(10,14);
printf("The issued book is removed from list");

       }

}
if(findbook!='t')
{
gotoxy(10,15);
printf("No Record Found");
}
}
gotoxy(10,16);
printf("Delete any more?(Y/N)");
another=getch();
}
}
default:
gotoxy(10,18);
printf("\aWrong Entry!!");
    getch();
issuebooks();
break;
      }
      gotoxy(1,30);
      returnfunc();
}
void viewbooks(void)  //show the list of book persists in library
{
    int i=0,j;
    system("cls");
    gotoxy(1,1);
    printf("*********************************Book List*****************************");
    gotoxy(2,2);
    printf(" CATEGORY     ID    BOOK NAME     AUTHOR       QTY     PRICE     RackNo ");
    j=4;
    fp=fopen("Bibek.dat","rb");
    while(fread(&a,sizeof(a),1,fp)==1)
    {
gotoxy(3,j);
printf("%s",a.cat);
gotoxy(16,j);
printf("%d",a.id);
gotoxy(22,j);
printf("%s",a.name);
gotoxy(36,j);
printf("%s",a.Author);
gotoxy(50,j);
printf("%d",a.quantity);
gotoxy(57,j);
printf("%.2f",a.Price);
gotoxy(69,j);
printf("%d",a.rackno);
printf("\n\n");
j++;
i=i+a.quantity;
      }
      gotoxy(3,25);
      printf("Total Books =%d",i);
      fclose(fp);
      gotoxy(35,25);
      returnfunc();
}
void editbooks(void)  //edit information about book
{
system("cls");
int c=0;
int d,e;
gotoxy(20,4);
printf("****Edit Books Section****");
char another='y';
while(another=='y')
{
system("cls");
gotoxy(15,6);
printf("Enter Book Id to be edited:");
scanf("%d",&d);
fp=fopen("Bibek.dat","rb+");
while(fread(&a,sizeof(a),1,fp)==1)
{
if(checkid(d)==0)
{
gotoxy(15,7);
printf("The book is availble");
gotoxy(15,8);
printf("The Book ID:%d",a.id);
gotoxy(15,9);
printf("Enter new name:");scanf("%s",a.name);
gotoxy(15,10);
printf("Enter new Author:");scanf("%s",a.Author);
gotoxy(15,11);
printf("Enter new quantity:");scanf("%d",&a.quantity);
gotoxy(15,12);
printf("Enter new price:");scanf("%f",&a.Price);
gotoxy(15,13);
printf("Enter new rackno:");scanf("%d",&a.rackno);
gotoxy(15,14);
printf("The record is modified");
fseek(fp,ftell(fp)-sizeof(a),0);
fwrite(&a,sizeof(a),1,fp);
fclose(fp);
c=1;
}
if(c==0)
{
gotoxy(15,9);
printf("No record found");
}
}
gotoxy(15,16);
printf("Modify another Record?(Y/N)");
fflush(stdin);
another=getch() ;
}
returnfunc();
}
void returnfunc(void)
{
    {
printf(" Press ENTER to return to main menu");
    }
    a:
    if(getch()==13) //allow only use of enter
    mainmenu();
    else
    goto a;
}
int getdata()
{
int t;
gotoxy(20,3);printf("Enter the Information Below");
gotoxy(20,4);printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
gotoxy(20,5);
printf("\xB2");gotoxy(46,5);printf("\xB2");
gotoxy(20,6);
printf("\xB2");gotoxy(46,6);printf("\xB2");
gotoxy(20,7);
printf("\xB2");gotoxy(46,7);printf("\xB2");
gotoxy(20,8);
printf("\xB2");gotoxy(46,8);printf("\xB2");
gotoxy(20,9);
printf("\xB2");gotoxy(46,9);printf("\xB2");
gotoxy(20,10);
printf("\xB2");gotoxy(46,10);printf("\xB2");
gotoxy(20,11);
printf("\xB2");gotoxy(46,11);printf("\xB2");
gotoxy(20,12);
printf("\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2\xB2");
gotoxy(21,5);
printf("Category:");
gotoxy(31,5);
printf("%s",catagories[s-1]);
gotoxy(21,6);
printf("Book ID:\t");
gotoxy(30,6);
scanf("%d",&t);
if(checkid(t) == 0)
{
gotoxy(21,13);
printf("\aThe book id already exists\a");
getch();
mainmenu();
return 0;
}
a.id=t;
gotoxy(21,7);
printf("Book Name:");gotoxy(33,7);
scanf("%s",a.name);
gotoxy(21,8);
printf("Author:");gotoxy(30,8);
scanf("%s",a.Author);
gotoxy(21,9);
printf("Quantity:");gotoxy(31,9);
scanf("%d",&a.quantity);
gotoxy(21,10);
printf("Price:");gotoxy(28,10);
scanf("%f",&a.Price);
gotoxy(21,11);
printf("Rack No:");gotoxy(30,11);
scanf("%d",&a.rackno);
return 1;
}
int checkid(int t)  //check whether the book is exist in library or not
{
rewind(fp);
while(fread(&a,sizeof(a),1,fp)==1)
if(a.id==t)
return 0;  //returns 0 if book exits
      return 1; //return 1 if it not
}
int t(void) //for time
{
time_t t;
time(&t);
printf("Date and time:%s\n",ctime(&t));

return 0 ;
}
//void show_mouse(void) //show inactive mouse pointer in programme
//{
//union REGS in,out;
//
//       in.x.ax = 0x1;
//       int86(0x33,&in,&out);
//}
void Password(void) //for password option
{

   system("cls");
   char d[25]="Password Protected";
   char ch,pass[10];
   int i=0,j;
   //textbackground(WHITE);
   //textcolor(RED);
    gotoxy(10,4);
    for(j=0;j<20;j++)
    {
    delay(50);
    printf("*");
    }
    for(j=0;j<20;j++)
   {
   delay(50);
   printf("%c",d[j]);
   }
   for(j=0;j<20;j++)
   {
   delay(50);
   printf("*");
   }
   gotoxy(10,10);
   gotoxy(15,7);
   printf("Enter Password:");

   while(ch!=13)
   {
ch=getch();

if(ch!=13 && ch!=8){
putch('*');
pass[i] = ch;
i++;
}
   }
   pass[i] = '\0';
   if(strcmp(pass,password)==0)
   {

gotoxy(15,9);
//textcolor(BLINK);
printf("Password match");
gotoxy(17,10);
printf("Press any key to countinue.....");
getch();
mainmenu();
   }
   else
   {
gotoxy(15,16);
printf("\aWarning!! Incorrect Password");
getch();
Password();
   }
}
void issuerecord()  //display issued book's information
{
system("cls");
gotoxy(10,8);
printf("The Book has taken by Mr. %s",a.stname);
gotoxy(10,9);
printf("Issued Date:%d-%d-%d",a.issued.dd,a.issued.mm,a.issued.yy);
gotoxy(10,10);
printf("Returning Date:%d-%d-%d",a.duedate.dd,a.duedate.mm,a.duedate.yy);
}
void loaderanim()
{
int loader;
system("cls");
gotoxy(20,10);
printf("LOADING........");
printf("\n\n");
gotoxy(22,11);
for(loader=1;loader<20;loader++)
{
delay(100);printf("%c",219);}
}
//End of program