PROJECT ON ELECTRONIC Telephone DAIRY in C++(Minni Project)

#include<process.h>
#include<dos.h>
#include<conio.h>
#include<fstream.h>
#include<stdio.h>
#include<string.h>
//************************************************************************
**
//                  Structure of telephone directory
//************************************************************************
**
struct tel
{
    char telno[20];
    char name[20];
    char add[20];
}s;
//************************************************************************
**
//                            Functions
//************************************************************************
**
void display(void);
void enquiryt(void);
void enquiryn(void);
void delet(void);
void option(void);
void des(void);
void box_fill(void);
//************************************************************************
**
//                            Main Function
//************************************************************************
**
main()
{
    clrscr();
    textbackground(3);
    textcolor(4);
    for (int i=1;i<24;i++)
    {
  clrscr();
  gotoxy(i,1);
  cprintf("  ***Telephone Directory*** ");
  delay(100);
    }
    for (int o=2;o<7;o++)
    {
  clrscr();
  gotoxy(23,o);
  cout<<" ***Telephone Directory*** ";
  delay(100);
    }
    delay(1000);
    gotoxy(33,9);
    cout<<" Made By:- ";
    delay (1000);
    gotoxy(31,11);
    cout<<" Divya Batra ";
    delay(1000);
    gotoxy(32,13);
    cout<<" Class XII-A ";
    delay(1000);
    gotoxy(22,15);
    cout<<" The Heritage School Vasant Kunj ";
    delay(3000);
    getch();
    option();
}
//************************************************************************
**
//                              Main Menu
//************************************************************************
**
void option(void)
{
    clrscr();
    int j;
    box_fill();
    gotoxy(30,3);
    cout<<"***** MAIN MENU *****";
    gotoxy(15,6);
    cout<<" 1. Add Records. ";
    gotoxy(15,8);
    cout<<" 2. Get enquiry from telephone number. ";
    gotoxy(15,10);
    cout<<" 3. Get enquiry from names of person. ";
    gotoxy(15,12);
    cout<<" 4. Delete Records. ";
    gotoxy(15,14);
    cout<<" 5. Exit. ";
    gotoxy(15,16);
    cout<<" Enter your choice:";
    cin>>j;
    switch(j)
    {
  case 1:
  display();
  break;
  case 2:
  enquiryt();
  break;
  case 3:
  enquiryn();
  break;
  case 4:
  delet();
  break;
  default:
  exit(1);
    }
}
void des(void)
{
    gotoxy(10,23);
    cout<<"
 Press any key to see main menu again.....
";
    getch();
    option();
}
//************************************************************************
**
//                  Function to create file of people
//************************************************************************
**
void display(void)
{
    clrscr();
    char ans;
    ans='y';
    ofstream fp;
    fp.open("Tel.dat",ios::app);
    do
    {
  box_fill();
//  char ch=cin.get();
  gotoxy(13,6);
  cout<<" Telephone number:";
  gets(s.telno);
  gotoxy(13,8);
  cout<<" Name of Person:";
  gets(s.name);
  gotoxy(13,10);
  cout<<" Address:";
  cin>>s.add;
  fp.write((char *)&s,sizeof(tel));
  gotoxy(13,12);
  cout<<" Do you want to Continue:";
  cin>>ans;
    }
    while(ans=='y');
    fp.close();
    des();
}
//************************************************************************
**
//        Function to get enquiry by telephone from main file
//************************************************************************
**
void enquiryt(void)
{
    char v[20];
    clrscr();
    ifstream fp5;
    fp5.open("Tel.dat");
    box_fill();
    gotoxy(15,10);
    cout<<" Enter the desire telephone number:";
    cin>>v;
    while(fp5)
    {
  fp5.read((char *)&s,sizeof(tel));
  if(!fp5)
  break;
  if(strcmp(s.telno,v)==0)
  {
      gotoxy(15,14);
      cout<<" Telephone Number: "<<s.telno;
      gotoxy(15,16);
      cout<<" Name: "<<s.name;
      gotoxy(15,18);
      cout<<" Address: "<<s.add;
  }
    }
    fp5.close();
    des();
}
//************************************************************************
**
//              Function to get enquiry by name from main file
//************************************************************************
**
void enquiryn(void)
{
    char a[20];
    clrscr();
    ifstream fp5;
    fp5.open("Tel.dat");
    box_fill();
    gotoxy(15,10);
    cout<<" Enter the name:";
    cin>>a;
    while(fp5)
    {
  fp5.read((char *)&s,sizeof(tel));
  if(!fp5)
  break;
  if(strcmp(a,s.name)==0)
  {
      gotoxy(15,14);
      cout<<" Telephone Number: "<<s.telno;
      gotoxy(15,16);
      cout<<" Name: "<<s.name;
      gotoxy(15,18);
      cout<<" Address: "<<s.add;
  }
    }
    fp5.close();
    des();
}
//************************************************************************
**
//            Function to delete any record from main file
//************************************************************************
**
void delet(void)
{
    char v[20];
    clrscr();
    ifstream fp;
    fp.open("Tel.dat");
    ofstream fp1;
    fp1.open("Tel1.dat");
    while(fp)
    {
  fp.read((char *)&s,sizeof(tel));
  if(!fp)
  break;
  fp1.write((char *)&s,sizeof(tel));
    }
    fp.close();
    fp1.close();
    ifstream afile;
    ofstream bfile;
    afile.open("Tel1.dat");
    bfile.open("Tel.dat");
    box_fill();
    gotoxy(14,10);
    cout<<" Enter the telephone number to be deleted: ";
    cin>>v;
    while(afile)
    {
  afile.read((char *)&s,sizeof(tel));
  if(!afile)
  break;
  if(strcmp(s.telno,v)!=0)
  {
      bfile.write((char *)&s,sizeof(tel));
  }
    }
    bfile.close();
    afile.close();
    des();
}
//************************************************************************
**
//            Procedure for creating box for menues and prompts
//************************************************************************
**
void box_fill(void)
{
    int xr,xc;
    int la,ra;
    gotoxy(10,2);
    for(xr=1;xr<=60;xr++)
    cout<<"*";
    xc=3;
    for(la=1;la<=19;la++)
    {
  gotoxy(10,xc);
  cout<<"()";
  gotoxy(69,xc);
  cout<<"()";
  xc++;
    }
    gotoxy(10,22);
    for(xr=1;xr<=60;xr++)
    cout<<"*";
}