C++ Program to maintain Student Information using File
#include<fstream>
#include<cstring>
#include<string.h>
#include<iomanip>
using namespace std;
const int MAX=20;
class Student
{
int rollno;
char name[20],city[20];
char div;
int year;
public:
Student()
{
strcpy(name,"");
strcpy(city,"");
rollno=year=div=0;
}
Student(int rollno,char name[MAX],int year,char div,char city[MAX])
{
strcpy(this->name,name);
strcpy(this->city,city);
this->rollno=rollno;
this->year=year;
this->div=div;
}
int getRollNo()
{
return rollno;
}
void displayRecord()
{
cout<<endl<<setw(5)<<rollno<<setw(20)<<name<<setw(5)<<year<<setw(5)<<div<<setw(10)<<city;
}
};
//==========File Operations ===========
class FileOperations
{
fstream file;
public:
FileOperations(char* filename)
{
ofstream newFile(filename,ios::app|ios::binary);
file.open(filename,ios::in|ios::out|ios::ate|ios::binary);
}
void insertRecord(int rollno, char name[MAX],int year, char div,char city[MAX])
{
Student s1(rollno,name,year,div,city);
file.seekp(0,ios::end);
file.write((char *)&s1,sizeof(Student));
file.clear();
}
void displayAll()
{
Student s1;
file.seekg(0,ios::beg);
while(file.read((char *)&s1, sizeof(Student)))
{
s1.displayRecord();
}
file.clear();
}
void displayRecord(int rollNo)
{
Student s1;
file.seekg(0,ios::beg);
bool flag=false;
while(file.read((char*)&s1,sizeof(Student)))
{
if(s1.getRollNo()==rollNo)
{
s1.displayRecord();
flag=true;
break;
}
}
if(flag==false)
{
cout<<"\nRecord of "<<rollNo<<"is not present.";
}
file.clear();
}
void deleteRecord(int rollno)
{
ofstream outFile("new.dat",ios::binary);
file.seekg(0,ios::beg);
bool flag=false;
Student s1;
while(file.read((char *)&s1, sizeof(Student)))
{
if(s1.getRollNo()==rollno)
{
flag=true;
continue;
}
outFile.write((char *)&s1, sizeof(Student));
}
if(!flag)
{
cout<<"\nRecord of "<<rollno<<" is not present.";
}
file.close();
outFile.close();
remove("student1.dat");
rename("new.dat","student1.dat");
file.open("student1.dat",ios::in|ios::out|ios::ate|ios::binary);
}
~FileOperations()
{
file.close();
cout<<"\nFile Closed.";
}
};
int main()
{
FileOperations file((char*)"student1.dat");
int rollNo,year,choice=0;
char div;
char name[MAX],address[MAX];
while(choice!=5)
{
cout<<"\n*****Student Database*****\n";
cout<<"1) Add New Record\n";
cout<<"2) Display All Records\n";
cout<<"3) Display by RollNo\n";
cout<<"4) Deleting a Record\n";
cout<<"5) Exit\n";
cout<<"Choose your choice : ";
cin>>choice;
switch(choice)
{
case 1 : //New Record
cout<<endl<<"Enter RollNo and name : \n";
cin>>rollNo>>name;
cout<<"Enter Year and Division : \n";
cin>>year>>div;
cout<<"Enter address : \n";
cin>>address;
file.insertRecord(rollNo,name,year,div,address);
cout<<"\nRecord Inserted.";
break;
case 2 :
cout<<endl<<setw(5)<<"ROLL"<<setw(20)<<"NAME"<<setw(5)<<"YEAR"<<setw(5)<<"DIV"<<setw(10)<<"CITY";
file.displayAll();
break;
case 3 :
cout<<"Enter Roll Number";
cin>>rollNo;
file.displayRecord(rollNo);
break;
case 4:
cout<<"Enter rollNo";
cin>>rollNo;
file.deleteRecord(rollNo);
break;
case 5 :break;
}
}
return 0;
}
Output
*****Student Database*****
1) Add New Record
2) Display All Records
3) Display by RollNo
4) Deleting a Record
5) Exit
Choose your choice : 1
Enter RollNo and name :
1
a
Enter Year and Division :
1
a
Enter address :
pune
Record Inserted.
*****Student Database*****
1) Add New Record
2) Display All Records
3) Display by RollNo
4) Deleting a Record
5) Exit
Choose your choice : 1
Enter RollNo and name :
2
b
Enter Year and Division :
1
b
Enter address :
pune
Record Inserted.
*****Student Database*****
1) Add New Record
2) Display All Records
3) Display by RollNo
4) Deleting a Record
5) Exit
Choose your choice : 2
ROLL NAME YEAR DIV CITY
1 a 1 a pune
2 b 1 b pune
*****Student Database*****
1) Add New Record
2) Display All Records
3) Display by RollNo
4) Deleting a Record
5) Exit
Choose your choice : 3
Enter Roll Number2
2 b 1 b pune
*****Student Database*****
1) Add New Record
2) Display All Records
3) Display by RollNo
4) Deleting a Record
5) Exit
Choose your choice : 4
Enter rollNo1
*****Student Database*****
1) Add New Record
2) Display All Records
3) Display by RollNo
4) Deleting a Record
5) Exit
Choose your choice : 2
ROLL NAME YEAR DIV CITY
2 b 1 b pune
*****Student Database*****
1) Add New Record
2) Display All Records
3) Display by RollNo
4) Deleting a Record
5) Exit
Choose your choice :
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