Library Management System.cpp

#include<bits/stdc++.h>
#include<iostream>
#include<fstream>
#include<stdlib.h>
#include<stdio.h>
#include<process.h>
#include<conio.h>
using namespace std;
#define el "\n"
#define sp " "

int res_book(int,int);				//To check whether any book a given book no. exists or not
/*Class of books*/
class book
{
	protected:
	int bno,quant;						//book no 
	char bname[50]; 				//book name
	char aname[50]; 				//book author's name
	char pname[50];  				//publication name
	public:
		void createb();
		void showb();
		void showlist();
		void assignbno(int x)       //bno assigned on the basis of no
		{						    //no. of objects in file
			bno=10001;
			bno+=x-1;
			start1:
				bno+=1;
				if(res_book(bno,0))
				goto start1;
		}
		void set_q()
		{
			quant-=1;
		}
		int quantity()
		{
			return quant;
		}
		void reset_q()
		{
			quant+=1;
		}
		int retbno()
		{
			return bno;
		} 
};
/*End of class book*/


void book::createb()							//To enter data in data members of class book
{
	int i;
	cout<<"\n\t\tEnter the details:-\n";
	cout<<"\n\t\tEnter Book's Name: ";
	char n[50];
	cin.getline(n,50);
	cin.getline(bname,50);
	for(i=0;bname[i]!='\0';i++)
	{
		if(bname[i]>='a'&&bname[i]<='z')
		bname[i]-=32;
	}
	cout<<"\n\t\tEnter Author's Name: ";
	cin.getline(aname,50);
	cout<<"\n\t\tEnter Publication Name: ";
	cin.getline(pname,50);
	cout<<"\n\t\tEnter Book's quantity: ";
	cin>>quant;
}


void book::showb()											//To display the details of books
{
	cout<<"\n\t\tBook No.: "<<bno<<el;
	cout<<"\n\t\tBook Name: "<<bname<<el;
	cout<<"\n\t\tBook's Author Name: "<<aname<<el;
	cout<<"\n\t\tBook's Publication: "<<pname<<el;
	cout<<"\n\t\tBook's Quantity: "<<quant<<el;
}


void book::showlist()										//To display book details in list form
{
	cout<<"\n\t"<<bno<<"\t\t"<<bname<<"\t\t"<<aname<<"\t\t"<<quant;
}


/*Class of Students*/
class student
{
	protected:
		char name[25];					//Student name
		int bno;						//Book no. of book issued
		int token;						//To veirfy book issued or not
	public:
		void creates();
		void shows();
		void showlist();
		void settoken(int x)			//To set token and assign bno a book no
		{
			bno=x;
			token=1;
		}
		void resettoken()				//To reset token
		{
			bno=0;
			token=0;
		}
		int retbno()
		{
			return bno;
		}
		int admno;						//Admission No
};
/*End of class Students*/

bool res_student(int);					//To check whether the admission no. already exist or not
void student::creates()                //To enter values to all data members of class student
{
	int i;
	plane:
	system("CLS");
	cout<<"\n\t\tEnter the details:-\n";
	cout<<"\n\t\tEnter student's Admission no: ";
	cin>>admno;
	if(res_student(admno))
	{
		cout<<"\n\t\tRecord already exist with this admission no.";
		cout<<"\n\t\tEnter a different admission no.\n";
		system("PAUSE");
		goto plane;
	}
	cout<<"\n\t\tEnter student's Name: ";
	char n[50];
	cin.getline(n,50);
	cin.getline(name,25);
	for(i=0;name[i]!='\0';i++)
	{
		if(name[i]>='a'&&name[i]<='z')
		name[i]-=32;
	}
	bno=0;
	token=0;
}


void student::shows()                                     //Show details of Students
{
	cout<<"\n\t\tStudent's Admission No.: "<<admno<<el;
	cout<<"\n\t\tStudent's Name: "<<name<<el;
	if(token==1)
	{
		cout<<"\n\t\tBook Issued (Book no): "<<bno;
	}
}


void student::showlist()                                  // To display Student details in list form
{
	cout<<"\n\t"<<admno<<"\t\t"<<name<<"\t\t"<<bno;
}


/*To Write object of class book in file*/
void write_book()
{
	book bk;
	ofstream outf("book1.bin",ios::app|ios::binary);
	outf.seekp(0,ios::end);
	int x=outf.tellp()/sizeof(book);
	bk.assignbno(x);
	bk.createb();
	bk.showb();
	outf.write(reinterpret_cast<char *>(&bk),sizeof(book));
	cout<<"\n\t\tRecord added successfully";
	outf.close();
}


/*To Write object of class student in file*/
void write_student()
{
	student st;
	ofstream outf("student.bin",ios::app|ios::binary);
	outf.seekp(0,ios::end);
	st.creates();
	st.shows();
	outf.write(reinterpret_cast<char *>(&st),sizeof(student));
	cout<<"\n\t\tRecord added successfully";
	outf.close();
}

/*To display Student records in list form*/
void list_student()
{
	system("CLS");
	student st;
	ifstream intf("student.bin",ios::in|ios::binary);
	intf.seekg(0,ios::beg);
	if(!intf)
	cout<<"\n\t\tFile not found";
	else
	{
		cout<<"\n\t*****Students Details*****\n\n";
		cout<<"\n\tAdmission No:\tName: \tBook Issued:";
		while(intf.read(reinterpret_cast<char *>(&st),sizeof(student)))
		st.showlist();
	}
	intf.close();
}


/*To display book records in list form*/
void list_book()
{
	book bk;
	ifstream intf("book1.bin",ios::in|ios::binary);
	intf.seekg(0,ios::beg);
	if(!intf)
	cout<<"\n\t\tFile not found";
	else
	{
		cout<<"\n\t*****Books Details*****\n\n";
		cout<<"\n\tBook No:\t\tName: \t\tAuthor's Name: \t\tQuantity: ";
		while(intf.read(reinterpret_cast<char *>(&bk),sizeof(book)))
		bk.showlist();
	}
	intf.close();
}


/*To search for a specific student*/
void search_student(int x)
{
	student st;
	int cnt=0;
	ifstream intf("student.bin",ios::in|ios::binary);
	intf.seekg(0,ios::beg);
	if(!intf)
	cout<<"\n\t\tFile not found";
	else
	{
		while(intf.read(reinterpret_cast<char *>(&st),sizeof(student)))
		{
			if(st.admno==x)
			{
				cnt++;
				cout<<"\n\t\tFILE FOUND!!!!";
				st.shows();
				break;
			}
		}
		if(cnt==0)
		cout<<"\n\t\tNo such record exists";
	}
	intf.close();
}


/*To search for a specific book*/
void search_book(int x)
{
	book bk;
	int cnt=0;
	ifstream intf("book1.bin",ios::in|ios::binary);
	intf.seekg(0,ios::beg);
	if(!intf)
	cout<<"\n\t\tFile not found";
	else
	{
		while(intf.read(reinterpret_cast<char *>(&bk),sizeof(book)))
		{
			if(bk.retbno()==x)
			{
				cnt++;
				cout<<"\n\t\tFILE FOUND!!!!";
				bk.showb();
				break;
			}
		}
		if(cnt==0)
		cout<<"\n\t\tNo such record exists";
	}
	intf.close();
}


/*To modify the book records*/
void modify_book(int x)
{
	book bk;
	int cnt=0;
	fstream intf("book1.bin",ios::in|ios::out|ios::ate|ios::binary);
	intf.seekg(0,ios::beg);
	if(!intf)
	cout<<"\n\t\tFile not found";
	else
	{
		while(intf.read(reinterpret_cast<char *>(&bk),sizeof(book)))
		{
			if(bk.retbno()==x)
			{
				cnt++;
				bk.createb();
				bk.showb();
				intf.seekp(intf.tellp()-sizeof(book));
				intf.write(reinterpret_cast<char *>(&bk),sizeof(book));
				cout<<"\n\t\tRecord Updated";
				break;
			}
		}
		if(cnt==0)
		cout<<"\n\t\tNo such record exists";
	}
	intf.close();
}


/*To modify the student records*/
void modify_student(int x)
{
	student st;
	int cnt=0;
	fstream intf("student.bin",ios::in|ios::out|ios::ate|ios::binary);
	intf.seekg(0,ios::beg);
	if(!intf)
	cout<<"\n\t\tFile not found";
	else
	{
		while(intf.read(reinterpret_cast<char *>(&st),sizeof(student)))
		{
			if(st.admno==x)
			{
				cnt++;
				st.creates();
				st.shows();
				intf.seekp(intf.tellp()-sizeof(student));
				intf.write(reinterpret_cast<char *>(&st),sizeof(student));
				cout<<"\n\t\tRecord Updated";
				break;
			}
		}
		if(cnt==0)
		cout<<"\n\t\tNo such record exists";
	}
	intf.close();
}


/*To delete a specific student record*/
void delete_student(int x)
{
	student st;
	int cnt=0;
	ifstream intf("student.bin",ios::in|ios::binary);
	intf.seekg(0,ios::beg);
	if(!intf)
	cout<<"\n\t\tFile not found";
	else
	{
		ofstream outf("temp.bin",ios::app|ios::binary);
		while(intf.read(reinterpret_cast<char *>(&st),sizeof(student)))
		{
			if(st.admno==x)
			cnt++;
			else
			outf.write(reinterpret_cast<char *>(&st),sizeof(student));
		}
		intf.close();
		outf.close();
		if(cnt==0)
		{
			remove("temp.bin");
			cout<<"\n\t\tNo such record exists";
		}
		else
		{
			remove("student.bin");
			rename("temp.bin","student.bin");
			cout<<"\n\t\tRecord deleted successfully";
		}
	}
}

/*To delete a specific book record*/
void delete_book(int x)
{
	book bk;
	int cnt=0;
	ifstream intf("book1.bin",ios::in|ios::binary);
	intf.seekg(0,ios::beg);
	if(!intf)
	cout<<"\n\t\tFile not found";
	else
	{
		ofstream outf("temp1.bin",ios::app|ios::binary);
		while(intf.read(reinterpret_cast<char *>(&bk),sizeof(book)))
		{
			if(bk.retbno()==x)
			cnt++;
			else
			outf.write(reinterpret_cast<char *>(&bk),sizeof(book));
		}
		intf.close();
		outf.close();
		if(cnt==0)
		{
			remove("temp1.bin");
			cout<<"\n\t\tNo such record exists";
		}
		else
		{
			remove("book.bin");
			rename("temp1.bin","book.bin");
			cout<<"\n\t\tRecord deleted successfully";
		}
	}
}

//To search whether a specific student record exists or not
bool res_student(int x)
{
	student st;
	int cnt=0,f=0;
	ifstream intf("student.bin",ios::in|ios::binary);
	intf.seekg(0,ios::beg);
	if(!intf)
	f=1;
	else
	{
		while(intf.read(reinterpret_cast<char *>(&st),sizeof(student)))
		{
			if(st.admno==x)
			{
				cnt++;
				break;
			}
		}
		if(cnt==0)
		f=1;
	}
	intf.close();
	if(f)
	return 0;
	else
	return 1;
}


/*To search a specific book and return true or false*/
int res_book(int x,int z)
{
	book bk;
	int cnt=0,f=1;
	fstream intf("book1.bin",ios::in|ios::out|ios::ate|ios::binary);
	intf.seekg(0,ios::beg);
	if(!intf)
	f=0;
	else
	{
		while(intf.read(reinterpret_cast<char *>(&bk),sizeof(book)))
		{
			if(bk.retbno()==x)
			{
				cnt++;
				if(z==1)
				{
					bk.showb();
					if(bk.quantity()>0)
					{
						bk.set_q();
						intf.seekp(intf.tellp()-sizeof(book));
						intf.write(reinterpret_cast<char *>(&bk),sizeof(book));
					}
					else
					f=2;
				}
				else if(z==2)
				{
					bk.showb();
					bk.reset_q();
					intf.seekp(intf.tellp()-sizeof(book));
					intf.write(reinterpret_cast<char *>(&bk),sizeof(book));
				}
				break;
			}
		}
		if(cnt==0)
		f=0;
	}
	intf.close();
	return f;
}


/*To issue books*/
void book_issue()
{
	int sn,bn;
	system("CLS");
	cout<<"\n\n\t\t*****BOOK ISSUE******";
	cout<<"\n\n\t\tEnter the student's admission no: ";
	cin>>sn;
	int cnt=0;
	student st;
	fstream outf("student.bin",ios::in|ios::out|ios::ate|ios::binary);
	outf.seekg(0,ios::beg);
	if(!outf)
	cout<<"\n\t\tFile not found\n";
	else
	{
		while(outf.read(reinterpret_cast<char *>(&st),sizeof(student)))
		{
			if(st.admno==sn)
			{
				cnt++;
				list_book();
				cout<<"\n\n\t\tEnter the book no.:";
				cin>>bn;
				cout<<"\n";
				int flag=res_book(bn,1);
				if(flag==1)
				{
					st.settoken(bn);
					outf.seekp(outf.tellp()-sizeof(student));
					outf.write(reinterpret_cast<char *>(&st),sizeof(student));
					cout<<"\n\t\tBook Issued";
					cout<<"\n\t\tNote: Write the current date in backside of the book";
					cout<<"\n\t\t      Should be submitted within 15 days to avoid fine";
					cout<<"\n\t\t      The fine is Rs. 1 for each day after 15 days period\n";
					break;
				}
				else if(flag==2)
				{
					cout<<"\n\t\tTHE BOOK IS OUT OF STOCK!!!";
					break;
				}
				else
				{
					cout<<"\n\t\tNo such record exists\n";
					break;
				}
			}
		}
		if(cnt==0)
		cout<<"\n\t\tNo such record exists\n";
	}
	outf.close();
}


/*To deposit books*/
void book_deposit()
{
	int sn,bn;
	system("CLS");
	cout<<"\n\n\t\t*****BOOK DEPOSIT******";
	cout<<"\n\n\t\tEnter the student's admission no: ";
	cin>>sn;
	int cnt=0;
	student st;
	fstream outf("student.bin",ios::in|ios::out|ios::ate|ios::binary);
	outf.seekg(0,ios::beg);
	if(!outf)
	cout<<"\n\t\tFile not found\n";
	else
	{
		while(outf.read(reinterpret_cast<char *>(&st),sizeof(student)))
		{
			if(st.admno==sn)
			{
				cnt++;
				bn=st.retbno();
				bool flag=res_book(bn,2);
				if(flag)
				{
					st.resettoken();
					outf.seekp(outf.tellp()-sizeof(student));
					outf.write(reinterpret_cast<char *>(&st),sizeof(student));
					int days;
					cout<<"\n\t\tBook deposited in no. of days:";
					cin>>days;
					if(days>15)
					{
						int fine=(days-15)*1;
						cout<<"\n\n\t\tFine: "<<fine<<el;
					}
					cout<<"\n\t\tBook Deposited Successfully\n";
					break;
				}
				else
				{
					cout<<"\n\t\tNo such record exists\n";
					break;
				}
			}
		}
		if(cnt==0)
		cout<<"\n\t\tNo such record exists\n";
	}
	outf.close();
}

/*Function that has features of Admin Menu*/
void admin_menu()
{
fine:
	system("PAUSE");
	system("CLS");
	int opt;
	cout<<"\n\n\n\t\t\t******ADMINISTRATOR MENU******";
    cout<<"\n\n\t1.\tCREATE STUDENT RECORD";
    cout<<"\n\n\t2.\tDISPLAY ALL STUDENTS RECORD";
    cout<<"\n\n\t3.\tDISPLAY SPECIFIC STUDENT RECORD ";
    cout<<"\n\n\t4.\tMODIFY STUDENT RECORD";
    cout<<"\n\n\t5.\tDELETE STUDENT RECORD";
    cout<<"\n\n\t6.\tCREATE BOOK ";
    cout<<"\n\n\t7.\tDISPLAY ALL BOOKS ";
    cout<<"\n\n\t8.\tDISPLAY SPECIFIC BOOK ";
    cout<<"\n\n\t9.\tMODIFY BOOK ";
    cout<<"\n\n\t10.\tDELETE BOOK ";
    cout<<"\n\n\t11.\tBACK TO MAIN MENU";
    cout<<"\n\n\tPlease Enter Your Choice (1-11) ";
    cin>>opt;
    if(opt==1)
    {
    	system("CLS");
    	write_student();
    	cout<<el;
    	goto fine;
	}
	else if(opt==2)
	{
		system("CLS");
    	list_student();
    	cout<<el;
    	goto fine;
	}
	else if(opt==3)
	{
		system("CLS");
		int ad;
		cout<<"\n\n\n\t\tEnter the admission no. of the student";
		cin>>ad;
		search_student(ad);
		cout<<el;
		goto fine;
	}
	else if(opt==4)
	{
		system("CLS");
		int ad;
		cout<<"\n\n\n\t\tEnter the admission no. of the student";
		cin>>ad;
		modify_student(ad);
		cout<<el;
		goto fine;
	}
	else if(opt==5)  
	{
		system("CLS");
		int ad;
		cout<<"\n\n\n\t\tEnter the admission no. of the student";
		cin>>ad;
		delete_student(ad);
		cout<<el;
		goto fine;
	}
	else if(opt==6)
    {
    	system("CLS");
    	write_book();
    	cout<<el;
    	goto fine;
	}
	else if(opt==7)
	{
		system("CLS");
    	list_book();
    	cout<<el;
    	goto fine;
	}
	else if(opt==8)
	{
		system("CLS");
		int ad;
		cout<<"\n\n\n\t\tEnter the book no. of the book";
		cin>>ad;
		search_book(ad);
		cout<<el;
		goto fine;
	}
	else if(opt==9)
	{
		system("CLS");
		int ad;
		cout<<"\n\n\n\t\tEnter the book no. of the book";
		cin>>ad;
		modify_book(ad);
		cout<<el;
		goto fine;
	}
	else if(opt==10)
	{
		system("CLS");
		int ad;
		cout<<"\n\n\n\t\tEnter the book no. of the book";
		cin>>ad;
		delete_book(ad);
		cout<<el;
		goto fine;
	}
	else if(opt==11)
	return ;
	else
	{
		cout<<"\n\t\tEnter correct option";
		cout<<el;
		goto fine;
	}
}

/*Checks for correct password*/
//The password if predefined and has to be changed through the source code 
//of application
bool passwords()
{
	int i=0;
	char ch,st[21],ch1[21]={"0000"};
	cout<<"\n\n\t\tEnter Password : ";
	while(1)
    {
    	ch=getch();
    	if(ch==13)
    	{
        	st[i]='\0';
        	break;
    	}
    	else if(ch==8&&i>0)
    	{
        	i--;
        	cout<<"\b \b";
    	}
    	else
    	{
    		cout<<"*";
    		st[i]=ch;
    		i++;
    	}
    }
    for(i=0;st[i]==ch1[i]&&st[i]!='\0'&&ch1[i]!='\0';i++);
    if(st[i]=='\0'&&ch1[i]=='\0')
    return 1;
    else
    return 0;
}

//Main function
int main()
{
	cout<<"\n\n\t\t\t*******************************************";
	cout<<"\n\t\t\t------------------------------------------";
	cout<<"\n\t\t\t\tLIBRARY MANAGEMENT SYSTEM";
	cout<<"\n\t\t\t------------------------------------------";
	cout<<"\n\t\t\t*******************************************";
	bool a=passwords();
	if(!a)
	{
		for(int i=0;i<2;i++)
		{
			cout<<"\nWrong password";
			cout<<"\nYou have "<<2-i<<"attempts left";
			if(passwords())
			goto last;
			if(i==1)
			{
				cout<<"\n\n\n\t\t\t All attempts failed........";
				cout<<"\n\n\t\t\t Sorry, but you can't login";
				exit(0);
			}
		}
	}
	last:
		cout<<"\n\n";
	start:
		system("PAUSE");
		system("CLS");
		int opt;
		cout<<"\n\n\t\t\t------------------------------------------";
		cout<<"\n\t\t\t\tLIBRARY MANAGEMENT SYSTEM";
		cout<<"\n\t\t\t------------------------------------------";
		cout<<"\n\n\t\t\tWhat do you want to do?";
		cout<<"\n\t\t\t1.\tBOOK ISSUE";
		cout<<"\n\t\t\t2.\tBOOK DEPOSIT";
		cout<<"\n\t\t\t3.\tADMINISTRATOR MENU";
		cout<<"\n\t\t\t4.\tExit";
		cout<<"\n\n Choose your option: ";
		cin>>opt;
		if(opt==1)
		{
			system("CLS");
			book_issue();
			goto start;
		}
		else if(opt==2)
		{
			system("CLS");
			book_deposit();
			goto start;	
		}
		else if(opt==3)
		{
			admin_menu();
			goto start;
		}
		else if(opt==4)
		exit(0);
		else
		{
			cout<<"\n\t\tEnter correct option";
			goto start;
		}
}