C++ project on SCHOOL MANAGEMENT

#include<iostream>
#include<fstream>
#include<iomanip>
using namespace std;

class student
{
int rollno;
char name[50];
int p_marks, c_marks, m_marks, e_marks, cs_marks;
double per;
char grade;
void calculate(); //function to calculate grade
public:
void getdata();  //function to accept data from user
void showdata() const; //function to show data on screen
void show_tabular() const;
int retrollno() const;
}; //class ends here


void student::calculate()
{
per=(p_marks+c_marks+m_marks+e_marks+cs_marks)/5.0;
if(per>=60)
  grade='A';
else if(per>=50)
  grade='B';
else if(per>=33)
  grade='C';
else
  grade='F';
}

void student::getdata()
{
cout<<"\nEnter The roll number of student ";
cin>>rollno;
cout<<"\n\nEnter The Name of student ";
cin.ignore();
cin.getline(name,50);
cout<<"\nEnter The marks in physics out of 100 : ";
cin>>p_marks;
cout<<"\nEnter The marks in chemistry out of 100 : ";
cin>>c_marks;
cout<<"\nEnter The marks in maths out of 100 : ";
cin>>m_marks;
cout<<"\nEnter The marks in english out of 100 : ";
cin>>e_marks;
cout<<"\nEnter The marks in computer science out of 100 : ";
cin>>cs_marks;
calculate();
}

void student::showdata() const
{
cout<<"\nRoll number of student : "<<rollno;
cout<<"\nName of student : "<<name;
cout<<"\nMarks in Physics : "<<p_marks;
cout<<"\nMarks in Chemistry : "<<c_marks;
cout<<"\nMarks in Maths : "<<m_marks;
cout<<"\nMarks in English : "<<e_marks;
cout<<"\nMarks in Computer Science :"<<cs_marks;
cout<<"\nPercentage of student is  :"<<per;
cout<<"\nGrade of student is :"<<grade;
}

void student::show_tabular() const
{
cout<<rollno<<setw(6)<<" "<<name<<setw(10)<<p_marks<<setw(4)<<c_marks<<setw(4)<<m_marks<<setw(4)
  <<e_marks<<setw(4)<<cs_marks<<setw(8)<<per<<setw(6)<<grade<<endl;
}

int  student::retrollno() const
{
return rollno;
}

void write_student(); //write the record in binary file
void display_all(); //read all records from binary file
void display_sp(int); //accept rollno and read record from binary file
void modify_student(int); //accept rollno and update record of binary file
void delete_student(int); //accept rollno and delete selected records from binary file
void class_result(); //display all records in tabular format from binary file
void result();  //display result menu
void intro();  //display welcome screen
void entry_menu(); //display entry menu on screen

int main()
{
char ch;
cout.setf(ios::fixed|ios::showpoint);
cout<<setprecision(2); // program outputs decimal number to two decimal places
intro();
do
{
  system("cls");
  cout<<"\n\n\n\tMAIN MENU";
  cout<<"\n\n\t01. RESULT MENU";
  cout<<"\n\n\t02. ENTRY/EDIT MENU";
  cout<<"\n\n\t03. EXIT";
  cout<<"\n\n\tPlease Select Your Option (1-3) ";
  cin>>ch;
  switch(ch)
  {
   case '1': result();
    break;
   case '2': entry_menu();
    break;
   case '3':
    break;
   default :cout<<"\a";
  }
    }while(ch!='3');
return 0;
}

void write_student()
{
student st;
ofstream outFile;
outFile.open("student.dat",ios::binary|ios::app);
st.getdata();
outFile.write(reinterpret_cast<char *> (&st), sizeof(student));
outFile.close();
    cout<<"\n\nStudent record Has Been Created ";
cin.ignore();
cin.get();
}

void display_all()
{
student st;
ifstream inFile;
inFile.open("student.dat",ios::binary);
if(!inFile)
{
  cout<<"File could not be open !! Press any Key...";
  cin.ignore();
  cin.get();
  return;
}
cout<<"\n\n\n\t\tDISPLAY ALL RECORD !!!\n\n";
while(inFile.read(reinterpret_cast<char *> (&st), sizeof(student)))
{
  st.showdata();
  cout<<"\n\n====================================\n";
}
inFile.close();
cin.ignore();
cin.get();
}

void display_sp(int n)
{
student st;
ifstream inFile;
inFile.open("student.dat",ios::binary);
if(!inFile)
{
  cout<<"File could not be open !! Press any Key...";
  cin.ignore();
  cin.get();
  return;
}
bool flag=false;
while(inFile.read(reinterpret_cast<char *> (&st), sizeof(student)))
{
  if(st.retrollno()==n)
  {
   st.showdata();
   flag=true;
  }
}
inFile.close();
if(flag==false)
  cout<<"\n\nrecord not exist";
cin.ignore();
cin.get();
}

void modify_student(int n)
{
bool found=false;
student st;
fstream File;
File.open("student.dat",ios::binary|ios::in|ios::out);
if(!File)
{
  cout<<"File could not be open !! Press any Key...";
  cin.ignore();
  cin.get();
  return;
}
    while(!File.eof() && found==false)
{

  File.read(reinterpret_cast<char *> (&st), sizeof(student));
  if(st.retrollno()==n)
  {
   st.showdata();
   cout<<"\n\nPlease Enter The New Details of student"<<endl;
   st.getdata();
      int pos=(-1)*static_cast<int>(sizeof(st));
      File.seekp(pos,ios::cur);
      File.write(reinterpret_cast<char *> (&st), sizeof(student));
      cout<<"\n\n\t Record Updated";
      found=true;
  }
}
File.close();
if(found==false)
  cout<<"\n\n Record Not Found ";
cin.ignore();
cin.get();
}

void delete_student(int n)
{
student st;
ifstream inFile;
inFile.open("student.dat",ios::binary);
if(!inFile)
{
  cout<<"File could not be open !! Press any Key...";
  cin.ignore();
  cin.get();
  return;
}
ofstream outFile;
outFile.open("Temp.dat",ios::out);
inFile.seekg(0,ios::beg);
while(inFile.read(reinterpret_cast<char *> (&st), sizeof(student)))
{
  if(st.retrollno()!=n)
  {
   outFile.write(reinterpret_cast<char *> (&st), sizeof(student));
  }
}
outFile.close();
inFile.close();
remove("student.dat");
rename("Temp.dat","student.dat");
cout<<"\n\n\tRecord Deleted ..";
cin.ignore();
cin.get();
}

void class_result()
{
student st;
ifstream inFile;
inFile.open("student.dat",ios::binary);
if(!inFile)
{
  cout<<"File could not be open !! Press any Key...";
  cin.ignore();
  cin.get();
  return;
}
cout<<"\n\n\t\tALL STUDENTS RESULT \n\n";
cout<<"==========================================================\n";
cout<<"R.No       Name        P   C   M   E   CS   %age   Grade"<<endl;
cout<<"==========================================================\n";
while(inFile.read(reinterpret_cast<char *> (&st), sizeof(student)))
{
  st.show_tabular();
}
cin.ignore();
cin.get();
inFile.close();
}

void result()
{
char ch;
int rno;
system("cls");
cout<<"\n\n\n\tRESULT MENU";
cout<<"\n\n\n\t1. Class Result";
cout<<"\n\n\t2. Student Report Card";
cout<<"\n\n\t3. Back to Main Menu";
cout<<"\n\n\n\tEnter Choice (1/2/3)? ";
cin>>ch;
system("cls");
switch(ch)
{
case '1' : class_result(); break;
case '2' : cout<<"\n\n\tEnter Roll Number Of Student : "; cin>>rno;
    display_sp(rno); break;
case '3' : break;
default: cout<<"\a";
}
}

void intro()
{
cout<<"\n\n\n\t\t WELCOME TO STUDENT REPORT CARD PROJECT";
cout<<"\n\n\n\tPress Enter To Continue\n\n";
//cout<<"\n\n\n\tMADE BY : SULABH AGRAWAL";
//cout<<"\n\tSCHOOL : CAMBRIDGE SCHOOL";
cin.get();
}

void entry_menu()
{
char ch;
int num;
system("cls");
cout<<"\n\n\n\tENTRY MENU";
cout<<"\n\n\t1.CREATE STUDENT RECORD";
cout<<"\n\n\t2.DISPLAY ALL STUDENTS RECORDS";
cout<<"\n\n\t3.SEARCH STUDENT RECORD ";
cout<<"\n\n\t4.MODIFY STUDENT RECORD";
cout<<"\n\n\t5.DELETE STUDENT RECORD";
cout<<"\n\n\t6.BACK TO MAIN MENU";
cout<<"\n\n\tPlease Enter Your Choice (1-6) ";
cin>>ch;
system("cls");
switch(ch)
{
case '1': write_student(); break;
case '2': display_all(); break;
case '3': cout<<"\n\n\tPlease Enter The roll number "; cin>>num;
   display_sp(num); break;
case '4': cout<<"\n\n\tPlease Enter The roll number "; cin>>num;
   modify_student(num);break;
case '5': cout<<"\n\n\tPlease Enter The roll number "; cin>>num;
   delete_student(num);break;
case '6': break;
default: cout<<"\a"; entry_menu();
}
}

Output:-

Same program in Java