C++ Project on Sim Management very easy to understanding

Sim Management Project

#include<iostream>

#include<fstream>

#include<Windows.h>

#include<stdio.h>

using namespace std;

class sim

{

private:

int simno;

int total;

int cnic_no;

int day;

int month;

int year;

char customer_firstname[20];

char customer_lastname[40];

public:

          sim():total(0)

          {}

          void open_new()

          {cout<<"ENTER SIM NUMBER :"<<endl;

          cin>>simno;

          cout<<"ENTER FIRST NAME OF CUSTOMER WHO WANT TO PURCHASE NEW SIM: "<<endl;

          cin>>customer_firstname;

          cout<<"ENTER LAST NAME OF CUSTOMER :"<<endl;

          cin>>customer_lastname;

          cout<<"ENTER CNIC NO. OF CUSTOMER: "<<endl;

          cin>>cnic_no;

          cout<<"ENTER DATE OF ISSUE SIM :"<<endl<<"ENTER DAY  :"<<endl;

          cin>>day;

          cout<<"ENTER MONTH :"<<endl;

          cin>>month;

          cout<<"ENTER YEAR  :"<<endl;

          cin>>year;

          }

          void show_simacount()

          {cout<<"_______SIM ACOUNT STATUS IS_______"<<endl;

          cout<<"sim no. is :"<<simno<<endl;

          cout<<"name of customer is :"<<customer_firstname<<" "<<customer_lastname<<endl;

          cout<<"CNIC no. is :"<<cnic_no<<endl;

          cout<<"date of issue :"<<day<<"/"<<month<<"/"<<year<<endl;}

          void modify_account()

          {cout<<"SIM NO. IS :"<<simno<<endl;

          cout<<"enter modify first name of customer : "<<endl;

          cin>>customer_firstname;

          cout<<"enter modigy last name of customer:"<<endl;

          cin>>customer_lastname;

          cout<<"ENTER modify CNIC NO. OF CUSTOMER: "<<endl;

          cin>>cnic_no;

          cout<<"ENTER MODIFY DATE OF ISSUE SIM :"<<endl<<"ENTER DAY  :"<<endl;

          cin>>day;

          cout<<"ENTER MODIFY MONTH :"<<endl;

          cin>>month;

          cout<<"ENTER MODIFY YEAR  :"<<endl;

          cin>>year;

          }

          int retsimno()

          {return simno;}

};

          fstream fp;

sim azz;

void write_sim()

{

fp.open("sim.dat",ios::out|ios::app);

azz.open_new();

fp.write((char*)&azz,sizeof(sim));

fp.close();

}

void display_sp()

{

int n;

cout<<"\n\n====SIM DETAILS====";

cout<<"\n\nEnter the SIM Number : ";

cin>>n;

int flag=0;

fp.open("sim.dat",ios::in);

while(fp.read((char*)&azz,sizeof(sim)))

{

          if(azz.retsimno()==n)

{

          azz.show_simacount();

flag=1;

}

}

fp.close();

if(flag==0)

cout<<"\n\nSIM Number does not exist"<<endl;

system("pause");

}

void modify_account()

{

int no,found=0;

cout<<"\n\n====MODIFY RECORD====";

cout<<"\n\nEnter the SIM  No. : ";

cin>>no;

fp.open("sim.dat",ios::in|ios::out);

while(fp.read((char*)&azz,sizeof(sim)) && found==0)

{

          if(azz.retsimno()==no)

{

          azz.show_simacount();

cout<<"5\n\n\n—-Enter the New Details—-\n";

azz.open_new();

int pos=-1*sizeof(azz);

fp.seekp(pos,ios::cur);

fp.write((char*)&azz,sizeof(sim));

cout<<"\n\n\t Record Updated";

found=1;

}

}

fp.close();

if(found==0)

cout<<"\n\n Record Not Found "<<endl;

system("pause");

}

void delete_account()

{

int no;

cout<<"\n\n====Delete Record===="<<endl;

cout<<"\n\nEnter The SIM No. : ";

cin>>no;

fp.open("sim.dat",ios::in|ios::out);

fstream fp2;

fp2.open("Temp.dat",ios::out);

fp.seekg(0,ios::beg);

while(fp.read((char*)&azz,sizeof(sim)))

{

          if(azz.retsimno()!=no)

{

fp2.write((char*)&azz,sizeof(sim));

}

}

fp2.close();

fp.close();

remove("sim.dat");

rename("Temp.dat","sim.dat");

cout<<"\n\n\tRecord Deleted .."<<endl;

system("pause");

}

void display_all()

{

fp.open("sim.dat",ios::in);

cout<<"\n\n\t\tSIM HOLDER LIST\n\n";

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

cout<<"Sim No.\tNAME\t\tFather Name\t\tCNIC No.\n etc.\n";

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

while(fp.read((char*)&azz,sizeof(sim)))

{

          azz.show_simacount();

}

fp.close();

system("pause");

}

void intro()

{system("color 15");

cout<<endl<<endl<<endl<<"===============";

Sleep(500);

cout<<"SIM=====";

Sleep(500);

cout<<"MANAGEMENT=====";

Sleep(500);

cout<<"SYSTEM";

Sleep(500);

cout<<"==============="<<endl<<endl;

Sleep(500);

cout<<"MADE BY :"<<endl;

Sleep(500);

cout<<"      Muhammad Azeem"<<endl;

Sleep(500);

cout<<"      Ali Raza"<<endl;

Sleep(500);

cout<<"      Haseeb Rana"<<endl;

Sleep(500);

cout<<"STUDENTS AT COMSATS SAHIWAL"<<endl;

Sleep(500);

cout<<"++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<endl;

}

void main()

{int ch;

intro();

Sleep(700);

do

{system("color C0");

cout<<"\n\tMAIN MENU";

cout<<"\n\n\tPRESS 1. TO ISSUE NEW SIM" ;

cout<<"\n\n\tPRESS 2. SIM ENQUIRY";

cout<<"\n\n\tPRESS 3. ALL SIM HOLDER LIST";

cout<<"\n\n\tPRESS 4. TO REMOVE A SIM ";

cout<<"\n\n\tPRESS 5. TO MODIFY REGISTERATION OF A SIM";

cout<<"\n\n\tPRESS 6. EXIT";

cout<<"\n\n\tPRESS Select Your Option (1-6) "<<endl;

cin>>ch;

system("color 46");

system("cls");

switch(ch)

{

case 1: 

          system("color 90");

          write_sim();

          system("cls");

break;

case 2:

          system("color 46");

          display_sp();

          system("cls");

break;

case 3: 

          system("color 27");

          display_all();

          system("cls");

break;

case 4:

          system("color 4B");

          delete_account();

          system("cls");

break;

case 5:

          system("color B6");

          modify_account();

          system("cls");

break;

case 6:

          system("color AC");

          exit(0);

          system("cls");

default : cout<<"YOU ENTERED A WRONG INTIGER  "<<endl;

         

}}

while(ch!=6);

system("Pause");}