Turbo C++ - Student Database Handling using Flat File System
I have come up with a simple menu driven version that can be used to add, edit, view and delete the student information system using flat file (binary file) system.
Refer to the following links for the same program in different languages:
1. Program in Turbo C++ for Menu Driven Student DB handling using Flat File
2. Program in Visual C++ for Menu Driven Student DB handling using Flat File
3. Program in C# for Menu Driven Student DB handling using Flat File
Source Code
#include <conio.h>
#include <process.h>
#include <dos.h>
#include <iostream.h>
#include <stdio.h>
#include <string.h>
#pragma pack(2)
struct CStudent
{
public:
char name[64];
long age;
char dept[64];
};
struct CStudents
{
#define MaxSz 100
char m_fileName[1024];
int m_nMaxStudents;
CStudent m_studList[MaxSz];
CStudents(const char *filename);
void AddRecord(const char *name, int age, const char *dept);
void EditRecord(int pos, const char *name, int age, const char *dept);
void DeleteRecord(int pos);
int ReadRecords();
int WriteRecords();
};
CStudents::CStudents(const char *filename)
{
m_nMaxStudents = 0;
strcpy(m_fileName, filename);
}
void CStudents::AddRecord(const char *name, int age, const char *dept)
{
int pos = m_nMaxStudents;
strcpy(m_studList[pos].name,name);
strcpy(m_studList[pos].dept,dept);
m_studList[pos].age = age;
m_nMaxStudents++;
WriteRecords();
}
void CStudents::EditRecord(int pos, const char *name, int age, const char *dept)
{
strcpy(m_studList[pos].name,name);
strcpy(m_studList[pos].dept,dept);
m_studList[pos].age = age;
WriteRecords();
}
void CStudents::DeleteRecord(int pos)
{
m_nMaxStudents--;
for(int i = pos; i < m_nMaxStudents; i++)
{
m_studList[i] = m_studList[i + 1];
}
WriteRecords();
}
int CStudents::ReadRecords()
{
FILE *istream = fopen(m_fileName, "rb");
if (istream == 0)
return 0;
char buf[4096];
int nTotalRecordsRead = 0;
for(int i = 0; i < MaxSz; i++)
{
if(feof(istream))
break;
int nBytesRead = fread(buf, 1, sizeof(CStudent), istream);
if(nBytesRead < sizeof(CStudent))
break;
char *p = (char*)(&m_studList[i]);
memcpy(p, buf, sizeof(CStudent));
nTotalRecordsRead++;
}
fclose(istream);
m_nMaxStudents = nTotalRecordsRead;
return nTotalRecordsRead;
}
int CStudents::WriteRecords()
{
FILE *ostream = fopen(m_fileName, "wb");
if (ostream == 0)
return 0;
int nTotalRecordsWritten = 0;
char buf[4096];
for(int i = 0; i < m_nMaxStudents; i++)
{
fwrite((char*)&m_studList[i], 1, sizeof(CStudent), ostream);
nTotalRecordsWritten++;
}
fclose(ostream);
return nTotalRecordsWritten;
}
CStudents theStudents("c:\\students.bin");
int DisplayMainMenu()
{
::system("cls");
gotoxy(10,4);
cout << "Welcome to Student Database Application";
gotoxy(10,5);
cout << "___________________________________________";
gotoxy(10,6);
cout << "1. Add Student Record";
gotoxy(10,7);
cout << "2. Edit Student Record";
gotoxy(10,8);
cout << "3. View Student Record";
gotoxy(10,9);
cout << "4. Delete Student Record";
gotoxy(10,10);
cout << "5. Exit";
gotoxy(10,11);
cout << "___________________________________________";
gotoxy(10,13);
cout << "Enter your Selection: ";
int m = -1;
cin >> m;
return m;
}
void ViewRecords()
{
theStudents.ReadRecords();
::system("cls");
gotoxy(10,4);
cout << "Welcome to Student Database Application";
gotoxy(10,5);
cout << "___________________________________________";
gotoxy(10,6);
cout << "SNo Student Name Age Department ";
gotoxy(10,7);
cout << "___________________________________________";
int pos = 8;
// Enable Paging
for(int i = 0; i < theStudents.m_nMaxStudents; i++)
{
gotoxy(10,pos);
cout << i + 1;
gotoxy(14,pos);
cout << theStudents.m_studList[i].name;
gotoxy(33,pos);
cout << theStudents.m_studList[i].age;
gotoxy(42,pos);
cout << theStudents.m_studList[i].dept;
pos++;
}
gotoxy(10,pos++);
cout << "___________________________________________";
pos++;
gotoxy(10,pos++);
}
void InputRecords()
{
while(1)
{
::system("cls");
gotoxy(10,4);
cout << "Welcome to Student Database Application";
gotoxy(10,5);
cout << "___________________________________________";
gotoxy(10,6);
cout << "Student Name: ";
gotoxy(10,7);
cout << "Age: ";
gotoxy(10,8);
cout << "Departement: ";
gotoxy(10,9);
cout << "___________________________________________";
gotoxy(23,6);
char name[64];
cin >> name;
gotoxy(17,7);
int age;
cin >> age;
gotoxy(23,8);
char dept[64];
cin >> dept;
theStudents.AddRecord(name, age, dept);
gotoxy(10,11);
cout << "Do you want to add another record (Y/N)? ";
char ch = getch();
if(ch == 'Y' || ch == 'y')
continue;
else
break;
}
}
void EditRecords()
{
ViewRecords();
cout << "Enter the serial number you want to edit: ";
int m;
cin >> m;
if(m >= 1 && m <= theStudents.m_nMaxStudents)
{
::system("cls");
gotoxy(10,4);
cout << "Welcome to Student Database Application";
gotoxy(10,5);
cout << "___________________________________________";
gotoxy(10,6);
cout << "Student Name: ";
gotoxy(10,7);
cout << "Age: ";
gotoxy(10,8);
cout << "Departement: ";
gotoxy(10,9);
cout << "___________________________________________";
gotoxy(23,6);
char name[64];
cin >> name;
gotoxy(17,7);
int age;
cin >> age;
gotoxy(23,8);
char dept[64];
cin >> dept;
theStudents.EditRecord(m - 1, name, age, dept);
gotoxy(10,12);
cout << "Record updated. Press any key to return to Main Menu";
getch();
}
else
{
gotoxy(10,12);
cout << "Invalid Entry. Press any key to return to Main Menu";
getch();
}
}
void DeleteRecords()
{
ViewRecords();
cout << "Enter the serial number you want to delete: ";
int m;
cin >> m;
if(m >= 1 && m <= theStudents.m_nMaxStudents)
{
theStudents.DeleteRecord(m - 1);
cout << "Record deleted. Press any key to return to Main Menu";
getch();
}
else
{
cout << "Invalid Entry. Press any key to return to Main Menu";
getch();
}
}
int main()
{
theStudents.ReadRecords();
while(1)
{
int selection = DisplayMainMenu();
switch(selection)
{
case 1:
InputRecords();
break;
case 2:
EditRecords();
break;
case 3:
{
ViewRecords();
cout << "Press any key to return to Main Manu: ";
getch();
}
break;
case 4:
DeleteRecords();
break;
case 5:
default:
return 0;
};
}
}
Click here to download the Turbo C++ source code and executable file.
Output
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