C++ Data File Handling Project with Delete, Modify and Restore Deleted data(with Classes and Objects)

 #include<iostream>

#include<fstream>

#include<string.h>

using namespace std;

class project{

int pid;

char pname[20];

char cate[20];

int qty;

float rate;

float amt;

public:

char* getpname();

int  getid();

void menu();

void addrecord();

void getdata();

void readrecord();

void showdata();

void search();

void deleterecord();

void restoredeletedrecord();

void viewdeletedrecord();

void modifyrecord();

};

project p;

char* project::getpname()

{

return pname;

}

int project::getid()

{

return pid;

}

void project::showdata()

{

cout<<"Product ID      : "<<pid<<endl;

cout<<"Product Name    : "<<pname<<endl;

cout<<"Product Category: "<<cate<<endl;

cout<<"Product Rate    : "<<rate<<endl;

cout<<"Product Quantity: "<<qty<<endl;

cout<<"Product Amount  : "<<amt<<endl;

cout<<"================================\n";

}

void project::menu()

{

int ch;

do{

cout<<"========================\n";

cout<<"|PROJECT 1 With DFH|\n";

cout<<"========================\n";

cout<<"0.Exit\n";

cout<<"1.Add A Product\n";

cout<<"2.Display All Products\n";

cout<<"3.Search A Products\n";

cout<<"4.Delete A Product\n";

cout<<"5.Review Deleted Product\n";

cout<<"6.Modify A Product\n";

cout<<"Enter Your Choice : ";

cin>>ch;

switch(ch)

{

case 1:

system("cls");

addrecord();

system("pause");

system("cls");

break;

case 2:

system("cls");

readrecord();

system("pause");

system("cls");

break;

case 3:

system("cls");

search();

system("pause");

system("cls");

break;

case 4:

system("cls");

deleterecord();

system("pause");

system("cls");

break;

case 5:

system("cls");

viewdeletedrecord();

system("pause");

system("cls");

break;

case 6:

system("cls");

modifyrecord();

// system("pause");

system("cls");

break;

}

}while(ch!=0);

}

void project::viewdeletedrecord()

{

int id;

ifstream fin;

ofstream fout;

fin.open("trash.hit",ios::binary);

fout.open("products.hit",ios::binary|ios::app);

cout<<"This is what I Found in Trash...\n";

while(fin.read((char*)&p,sizeof(p)))

{

showdata();

}

fin.close();

fin.open("trash.hit",ios::binary);

cout<<"Enter the Product Id to restore : ";

cin>>id;

int flag=0;

while(fin.read((char*)&p,sizeof(p)))

{

if(id==getid())

{

cout<<"Following product has been shifted...\n";

showdata();

fout.write((char*)&p,sizeof(p));

flag++;

}

}

if(flag==0)

cout<<"No such "<<id<<" in the file to restore....\n";

fin.close();

fout.close();

}

void project::deleterecord()

{

int chh,id;

ofstream fout1,fout2;

fout1.open("tmp.hit");

fout2.open("trash.hit",ios::app);

ifstream fin;

fin.open("products.hit",ios::binary);

cout<<"Enter the Id to Delete:";

cin>>id;

while(fin.read((char*)&p,sizeof(p)))

{

if(id==getid())

{

showdata();

cout<<"Following Record Will Be Deleted...\n";

fout2.write((char*)&p,sizeof(p));

}

else

{

fout1.write((char*)&p,sizeof(p));

}

}

fout1.close();

fout2.close();

fin.close();

remove("products.hit");

rename("tmp.hit","products.hit");

}

void project::getdata()

{

cout<<"Enter the Product id       : ";

cin>>pid;

cout<<"Enter the Product Name     : ";

cin>>pname;

cout<<"Enter the Product Category : ";

cin>>cate;

cout<<"Enter the Product Rate     : ";

cin>>rate;

cout<<"Enter the Product Quantity   : ";

cin>>qty;

amt=qty*rate;

}

void project::modifyrecord()

{

fstream fio;

fio.open("products.hit",ios::in|ios::binary|ios::out);

int rollno,flag=0,pos;

cout<<"Enter the roll No To be Modified :";

cin>>rollno;

while(fio.read((char*)&p,sizeof(p)))

{

if(rollno==p.getid())

{

pos=fio.tellg();

cout<<"Following Record Will Be Modified...\n";

showdata();

cout<<"Enter New Details :";

fio.tellg();

}

else

{

cout<<"Not Found";

}

}

}

void project::addrecord()

{

ofstream fout;

fout.open("products.hit",ios::binary|ios::app);

getdata();

fout.write((char*)&p,sizeof(p));

fout.close();

cout<<"\nData Saved to File.....\n";

}

void project::search()

{

int chh,id;

ifstream fin;

fin.open("products.hit",ios::binary);

cout<<"Enter how You want to search \n";

cout<<"1. Search By Product id \n";

cout<<"2. Search By Product name \n";

cin>>chh;

switch(chh)

{

case 1:

cout<<"Enter the Id That you have to search:";

cin>>id;

while(fin.read((char*)&p,sizeof(p)))

{

if(id==getid())

{

showdata();

}

else

{

cout<<"id not found....\n";

}

}

break;

case 2:

char name[20];

cout<<"Enter the Name you have to search:";

cin.ignore();

cin.getline(name,20);

while(fin.read((char*)&p,sizeof(p)))

{

if(strcmpi(getpname(),name)==0)

{

showdata();

}

else

{

cout<<"id not found....\n";

}

}

break;

}

}

void project::readrecord()

{

ifstream fin;

fin.open("products.hit",ios::binary);

while(fin.read((char*)&p,sizeof(p)))

{

showdata();

}

fin.close();

cout<<"\nFile Reading Completed...\n";

}

int main()

{

p.menu();

}