C++ program to show binary file operation using classes and Objects and perform Addition, Deletion, Modification, searching, Display of records.
/* Program to write student record using class and binary files
made by : rakesh kumar
*/
#include
#include
#include
using namespace std;
class student{
private:
int roll;
char name[30];
char address[100];
public:
void input(){
fflush(stdin);
cout<<"\n Enter Roll No:"; cin>>roll;
fflush(stdin);
cout<<"\n Enter Name :"; cin>>name;
fflush(stdin);
cout<<"\n Enter address :"; cin>>address;
}
void output(){
cout<<"\n\n Roll No :"<<roll;
cout<<"\n Name :"<<name;
cout<<"\n Address :"<<address;
}
int ret_roll()
{
return roll;
}
};
//global functions to write data in a binary file
void write_data()
{
ofstream fout("student.dat",ios::app|ios::binary);
student s;
s.input();
fout.write((char*)&s,sizeof(student));
fout.close();
}
//global functions to write data in a binary file
void read_data()
{
ifstream fin("student.dat",ios::binary);
student s;
while(fin.read((char*)&s,sizeof(student)))
s.output();
fin.close();
}
//global function to modify record in a binary file
void modify_data()
{
int troll;
int found=0;
student s;
ofstream fout("temp.dat",ios::binary);
ifstream fin("student.dat",ios::binary);
cout<<"\n Enter roll No to modify :"; cin>>troll;
while(fin.read((char*)&s,sizeof(student)))
{
if(troll==s.ret_roll())
{
cout<<"\n Enter New Values \n";
s.input();
found++;
}
fout.write((char*)&s,sizeof(student));
}
fin.close();
fout.close();
remove("student.dat");
rename("temp.dat","student.dat");
if(found!=0)
cout<<"\n Record Modified....";
else
cout<<"\n Record does not exist...";
}
//global function to delete record from a binary file
void delete_data()
{
int troll;
int found=0;
student s;
ofstream fout("temp.dat",ios::binary);
ifstream fin ("student.dat",ios::binary);
cout<<"\n Enter roll No to delele :"; cin>>troll;
while(fin.read((char*)&s,sizeof(student)))
{
if(troll!=s.ret_roll())
fout.write((char*)&s,sizeof(student));
}
fin.close();
fout.close();
remove("student.dat");
rename("temp.dat","student.dat");
if(found!=0)
cout<<"\n Record Deleted....";
else
cout<<"\n Record does not exist...";
}
int main(){
int choice;
do{
system("cls");
cout<<"\n\n\n\n\t\t\t File operations";
cout<<"\n\n\t\t\t1. Add New Record";
cout<<"\n\n\t\t\t2. Modify Record";
cout<<"\n\n\t\t\t3. Delete Record";
cout<<"\n\n\t\t\t4. Display Records";
cout<<"\n\n\t\t\t5. Quit Application";
cout<<"\n\n\n\n\t\t Enter your choice (1..5) :"; cin>>choice;
switch(choice)
{
case 1:
write_data();
break;
case 2:
modify_data();
break;
case 3:
delete_data();
break;
case 4:
read_data();
getch();
break;
case 5:
break;
default:
cout<<"\n Wrong Choice....Try again";
getch();
}
}while(choice!=5);
return 0;
}
The output of the program is as follows. The whole program was developed on Windows 10 using Dev C++ IDE.
Though we tried our best to keep our code clean. If you need any explanation of above code. Do not hesitate to contact us.
