Hi guys
i spend 3 weeks doing this project , but i don't know how to start
implement the Delete and update , can u please help me guys .?
here is my attachment
and my code
#include <iostream>
#include <fstream>
#include <cstring>
#include <cstdio>
using namespace std;
class Library
{
public:
int number;
char Title[40];
char Author[40];
char Publisher[40];
int Year_of_Publication;
//get number for ADD
int num_check()
{
ifstream in("Database.txt");
if(!in)
{
cout<<"Cannot open ""Database.txt"" file.\n";
return 1;
}
int i=1;
while(in>>number>>Title>>Author>>Publisher>>Year_of_Publication)
{i=i+1;}
number=i;
in.close();
return number;
}
void Search()
{
int m=0;
char Input_Title[40];
char Input_Author[40];
int Input_Year;
Library s;
ifstream in("Database.txt");
if(!in){
return ;
}
cout<<"\t 1. Title"<<endl;
cout<<"\t 2. Author/Publisher"<<endl;
cout<<"\t 3. Year of publication"<<endl;
cout<<endl<<"Select:";
cin>>m;
switch(m)
{
case 1:
cout<<"Input the title you want :";
cin>>Input_Title;
while(in>>s.number>>s.Title>>s.Author>>s.Publisher>>s.Year_of_Publication)//get every class
{
if(!strcmp(Input_Title,s.Title)){//when find
cout<<"\nNO: "<<s.number<<endl;
cout<<"\nTitle : "<<s.Title<<endl;
cout<<"Author/Publisher : "<<s.Author<<"/"<<s.Publisher<<endl;
cout<<"Year of publication : "<<s.Year_of_Publication<<endl<<endl; } }
break;
case 2:
cout<<"Input the Author or Publisher you want :";
cin>>Input_Author;
while(in>>s.number>>s.Title>>s.Author>>s.Publisher>>s.Year_of_Publication)//get every class
{
if((!strcmp(Input_Author,s.Author)) || !strcmp(Input_Author,s.Publisher)){//when find
cout<<"\nNO: "<<s.number<<endl;
cout<<"\nTitle : "<<s.Title<<endl;
cout<<"Author/Publisher : "<<s.Author<<"/"<<s.Publisher<<endl;
cout<<"Year of publication : "<<s.Year_of_Publication<<endl<<endl;}
}
break;
case 3:
cout<<"Input the Year of publication you want :";
cin>>Input_Year;
while(in>>s.number>>s.Title>>s.Author>>s.Publisher>>s.Year_of_Publication)//get every class
{{
if(Input_Year==s.Year_of_Publication)//when find
cout<<"\nNO: "<<s.number<<endl;
cout<<"\nTitle : "<<s.Title<<endl;
cout<<"Author/Publisher : "<<s.Author<<"/"<<s.Publisher<<endl;
cout<<"Year of publication : "<<s.Year_of_Publication<<endl<<endl; }}
break;
default :
cout<<"Error! use only 1~3";
break;
}
//error handling for charactor
fflush(stdin);
cin.clear();
cout<<endl<<endl<<"1.Search again"<<endl<<"2.Back to home"<<endl<<"Select:";
cin>>m;
switch(m){
case 1:
Search();
break;
default:
break;
}
//error handling for charator
fflush(stdin);
cin.clear();
}
int ADD()
{
char m;
Library s;
ofstream out;
out.open("Database.txt",ios::app);
if(!out)
{
cout<<"Can't open file.\n";
return 1;
}
cout <<"**********Add the new record**********"<<endl;
cout<<"Enter Title:";
cin>>s.Title;
cout<<"Enter Author:";
cin>>s.Author;
cout<<"Enter Publisher:";
cin>>s.Publisher;
cout<<"Enter Year of Publicaion:";
number=num_check();
cin>>Year_of_Publication;
out<<number<<endl;
out<<s.Title<<endl;
out<<s.Author<<endl;
out<<s.Publisher<<endl;
out<<Year_of_Publication<<endl<<endl;
out.close();
cout<<endl<<endl<<"1.Add another record"<<endl<<"2.Back to home"<<endl<<"Select:";
cin>>m;
switch(m){
case 1:
ADD();
break;
}
//error handling for charator
fflush(stdin);
cin.clear();
return 0;
}
int Show_database()
{
ifstream in("Database.txt");
if(!in)
{
cout<<"Can't open ""Database.txt"" file.\n";
return 1;
}
while(in>>number>>Title>>Author>>Publisher>>Year_of_Publication)
{cout<<"No: "<<number<<endl;
cout<<"Title :"<<Title<<endl;
cout<<"Author/Publisher : "<<Author<<" / "<<Publisher<<endl;
cout<<"Year of Publication : "<<Year_of_Publication<<endl<<endl;
}
in.close();
return 0;
}
void Exit()
{
return ;
}
void welcome()
{
cout<<"*********WELCOME TO SUNGKYUNKWAN LIBRARY MANAGEMENT SYSTEM*********"<<endl;
cout<<"_______________________________HOME PAGE___________________________"<<endl;
cout<<"Please choose one of the following options :"<<endl;
cout<<"\t 1. Search"<<endl;
cout<<"\t 2. Add the new record"<<endl;
cout<<"\t 3. Delete the existing record"<<endl;
cout<<"\t 4. Update the existing record"<<endl;
cout<<"\t 5. Display the full database"<<endl;
cout<<"\t 6. Exit"<<endl;
}
};
int main()
{
int last;
int n=0;
Library a;
while(1){
a.welcome();
cout<<endl<<"Select:";
cin>>n;
switch(n)
{
case 1:
a.Search();
break;
case 2:
a.ADD();
break;
case 3:
break;
case 4:
break;
case 5:
a.Show_database();
break;
case 6:
a.Exit();
break;
default:
cout<<"Error!! Enter 1~6"<<endl;
break;
}
fflush(stdin);
cin.clear();
}
cin>>last;
return 0;
}
