PROJECT.CPP

#include<iostream.h>
#include<fstream.h>
#include<iomanip.h>
#include<process.h>
#include<conio.h>
#include<stdio.h>
class student
{
 int rollno;
 char name[50];
 int p_marks, c_marks, m_marks, e_marks, cs_marks;
 float per;
 char grade;
 void calculate();	//function to calculate grade
 public:
 void getdata();		//function to accept data from user
 void showdata();	//function to show data on screen
 void show_tabular();
 int retrollno();
};
 void student::calculate()
 {
  per=(p_marks+c_marks+m_marks+e_marks+cs_marks)/5;
  if(per>=90)
  grade='A';
  else if(per>=80)
  grade='B';
  else if(per>=70)
  grade='C';
  else if(per>=60)
  grade='D';
  else if(per>=50)
  grade='E';
  else
  grade='F';
 }
 void student::getdata()
 {
  cout<<"\nEnter The roll number of student: ";
  cin>>rollno;
  cout<<"\n\nEnter The Name of student: ";
  gets(name);
  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()
 {
  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()
 {
  cout<<rollno<<setw(6)<<" "<<name<<setw(10)<<p_marks<<setw(4);
  cout<<c_marks<<setw(4)<<m_marks<<setw(4);
  cout<<e_marks<<setw(4)<<cs_marks<<setw(6)<<per<<setw(6)<<" "<<grade<<endl;
 }
 int  student::retrollno()
 {
  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()
 {
  int ch;
  cout.setf(ios::fixed|ios::showpoint);
  cout<<setprecision(2); // program outputs decimal number to two decimal places
  clrscr();
  intro();
  do
  {
   clrscr();
   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;
   clrscr();
   switch(ch)
   {
    case 1: result();
	   break;
    case 2: entry_menu();
	   break;
    case 3: exit(0);
	   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((char *) &st, sizeof(student));
   outFile.close();
   cout<<"\n\nStudent record Has Been Created ";
   cin.ignore();
   getch();
  }
  void display_all()
  {
   student st;
   ifstream inFile;
   inFile.open("student.dat",ios::binary);
   if(!inFile)
   {
    cout<<"File could not be open !! Press any Key...";
   }
   cout<<"\n\n\n\t\tDISPLAY ALL RECORD !!!\n\n";
   while(inFile.read((char *) &st, sizeof(student)))
   {
    st.showdata();
    cout<<"\n\n====================================\n";
   }
   inFile.close();
   getch();
  }
   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...";
    }
    int flag=0;
    while(inFile.read((char *) &st, sizeof(student)))
    {
     if(st.retrollno()==n)
     {
      st.showdata();
      flag=1;
      getch();
     }
    }
    inFile.close();
    if(flag==0)
    cout<<"\n\nrecord not exist";
   }
   void modify_student(int n)
   {
    int found=0;
    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...";

    }
    while(File.read((char *) &st, sizeof(student)) && found==0)
    {
     if(st.retrollno()==n)
     {
      st.showdata();
      cout<<"\n\nPlease Enter The New Details of student"<<endl;
      st.getdata();
      int pos=(-1)*sizeof(st);
      File.seekp(pos,ios::cur);
      File.write((char *) &st, sizeof(student));
      cout<<"\n\n\t Record Updated";
      found=1;
      getch();
     }
    }
    File.close();
    if(found==0)
    cout<<"\n\n Record Not Found ";
   }
    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...";
     }
     ofstream outFile;
     outFile.open("Temp.dat",ios::out);
     inFile.seekg(0,ios::beg);
     while(inFile.read((char *) &st, sizeof(student)))
     {
      if(st.retrollno()!=n)
      {
       outFile.write((char *) &st, sizeof(student));
      }
     }
     outFile.close();
     inFile.close();
     remove("student.dat");
     rename("Temp.dat","student.dat");
     cout<<"\n\n\tRecord Deleted ..";
     getch();
    }
     void class_result()
     {
      student st;
      ifstream inFile;
      inFile.open("student.dat",ios::binary);
      if(!inFile)
      {
       cout<<"File could not be open !! Press any Key...";
      }
      cout<<"\n\n\t\tALL STUDENTS RESULT \n\n";
      cout<<"==========================================================\n";
      cout<<"R.No  Name           P   C   M   E   CS %   Grade"<<endl;
      cout<<"==========================================================\n";
      while(inFile.read((char *) &st, sizeof(student)))
      {
       st.show_tabular();
       getch();
      }
      inFile.close();
     }
      void result()
      {
       int ch;
       int rno;
       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;
       clrscr();
       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:main();
	       break;
	default :cout<<"\a";
       }
      }
      void intro()
      {
       cout<<"\n\n\n\t\t\t\t      STUDENTS RECORD";
       cout<<"\n\t\t\t\t      -------";
       cout<<"\n\t\t\t\tEXAMINATION MANAGEMENT";
       cout<<"\n\t\t\t\t---------------------";
       cout<<"\n\t\t\t\t      PROJECT SUBMITTED TO--MA'AM VANDANA";
       cout<<"\n\t\t\t\t      -------";
       cout<<"\n\n\n\tMADE BY: SHIVAM SINGHAL";
       cout<<"\n\tCLASS: XII-A";
       cout<<"\n\tSCHOOL: DELHI INTERNATIONAL SCHOOL";
       getch();
      }
      void entry_menu()
      {
       int ch;
       int num;
       clrscr();
       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;
       clrscr();
       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:main();
	       break;
       }
      }