Menu Driven C++ Program To Read and Write in Binary File

Task: Menu Driven ( C++ ) C Plus Plus Program To Read and Write in Binary File. How This C++ File Program Works? This C++ program uses a menu driven approach.

Menu Driven ( C++ ) C Plus Plus Program To Read and Write in Binary File.

It displays a menu on screen as follows:

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+              Menu                   +
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ 1. Add Records of Students in File  +
+ 2. Display Records of Students      +
+ 3. Exit                             +
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Enter your choice 1, 2 or 3:1

As you can see, the C++ filing Program is asking the user to enter his choice 1, 2 or 3. If the user enters 1 and press Enter key, this will start ‘adding records process’.

*******Adding Records*********

Enter Student Record
Roll No:1
Name:Ahmad

Record has been added successfully
Add more records? press y or n =y
Enter Student Record
Roll No:2
Name:Shahid

Record has been added successfully
Add more records? press y or n =n

Therefore, the user adds two records and then he enters n to stop adding records process. This will display the menu again on screen. Further, if the user enters 2 as his choice, the program will show all ( that is 2) records on screen. This program will display the menu again. If the user enters 3 then the program will be terminated.

The Source Code of this Menu Driven C++ Program To Read and Write in Binary File

/* ====================================================*/
/*                                                     */
/*                                                     */
/*   (c) 2019 Author: wwww.EasyCodeBook.com            */
/*                                                     */
/*   Description                                       */
/*   Write a C++ Program to read and write records in  */
/*     binary file. Use a menu driven approach         */
/*                                                     */
/* ====================================================*/


#include<iostream>
#include<fstream>
#include<conio.h>
#include<stdlib.h>
#include<string>
using namespace std;

void addRecords();
void displayRecords();

struct student
{
int rollno;
char name[30];
}srecord;

fstream file1;
int main()
{

int choice=1;

while(1)
{
  // prnit menu
  
  cout<<"\n";
  cout<<"+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\n";
  cout<<"+                  Menu               +\n";
  cout<<"+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\n";
  cout<<"+ 1. Add Records of Students in File  +\n";
  cout<<"+ 2. Display Records of Students      +\n";
  cout<<"+ 3. Exit                             +\n";
  cout<<"+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+\n";
  cout<<"Enter your choice 1, 2 or 3:";
  
  cin>>choice;
  if(choice==1)
   addRecords();
  else if (choice==2)
   displayRecords();
  else if (choice==3)
  break;
  else
  cout<<"\n Invalid choice, Enter 1, 2 or 3 only:";
  
}
 cout<<"\nThanks for visiting www.EasyCodeBook.com";
}

void addRecords()
{
char ans;
int i;
//opening binary file in appending / writing mode	
file1.open("d://cppfile.dat",ios::binary |ios::app);

if(!file1)
{
cout<<"File could not open";
exit(0);
}
cout<<"\n*******Adding Records*********\n";
while(1)
{
cout<<"\nEnter Student Record\n";
cout<<"Roll No:";
cin>>srecord.rollno;
getchar();
cout<<"Name:";
gets(srecord.name);
/* write a record to binary file */
file1.write((char*)&srecord,sizeof(srecord));
cout<<"\nRecord has been added successfully";

cout<<"\nAdd more records? press y or n =";
ans=getche();
if(ans=='n' || ans=='N')
{
file1.close();
break;
}
}
}
void displayRecords()
{
int i;
//opening binary file in reading mode	

file1.open("d://cppfile.dat",ios::binary |ios::in);

if(!file1)
{
cout<<"File could not open";
exit(0);
}
cout<<"\n***Reading & Displaying Records***\n";
while(!file1.eof())
{
file1.read((char*)&srecord,sizeof(srecord));
if(!file1.eof())
{
cout<<"\n------------------\n";
cout<<"Roll No:"<<srecord.rollno;
cout<<"\nName:"<<srecord.name;
}
}
file1.close();
}

A Sample Run with Output of Menu Driven C++ Program To Read and Write in Binary File

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+                Menu                 +
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ 1. Add Records of Students in File  +
+ 2. Display Records of Students      +
+ 3. Exit                             +
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Enter your choice 1, 2 or 3:1

*******Adding Records*********

Enter Student Record
Roll No:1
Name:Ahmad

Record has been added successfully
Add more records? press y or n =y
Enter Student Record
Roll No:2
Name:Shahid

Record has been added successfully
Add more records? press y or n =n
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+                Menu                 +
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ 1. Add Records of Students in File  +
+ 2. Display Records of Students      +
+ 3. Exit                             +
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Enter your choice 1, 2 or 3:2

***Reading & Displaying Records***

------------------
Roll No:1
Name:Ahmad
------------------
Roll No:2
Name:Shahid
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+                Menu                 +
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ 1. Add Records of Students in File  +
+ 2. Display Records of Students      +
+ 3. Exit                             +
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Enter your choice 1, 2 or 3:3

Thanks for visiting www.EasyCodeBook.com
--------------------------------
Process exited after 1017 seconds with return value 0
Press any key to continue . . .