studentdetails project

code:

//***************************************************************
//     Student Details   PROJECT created by shakeer / /
//****************************************************************

#include<conio.h>
#include<stdio.h>
#include<process.h>
#include<fstream.h>
#include<iomanip.h>

//***************************************************************
//                   CLASS USED IN PROJECT
//****************************************************************

class student
{
    int rollno;
    char name[50];
    int p_marks,c_marks,m_marks,e_marks,cs_marks;
    float per;
    char grade;
    int std;
    void calculate()
    {
        per=(p_marks+c_marks+m_marks+e_marks+cs_marks)/5.0;
        if(per>=60)
            grade='A';
        else if(per>=50 && per<60)
              grade='B';
        else if(per>=33 && per<50)
             grade='C';
        else
             grade='F';
    }
 public:
    void 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 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  :"<<setprecision(2)<<per;
        cout<<"\nGrade of student is :"<<grade;
    }

    void show_tabular()
    {
    cout<<rollno<<setw(12)<<name<<setw(10)<<p_marks<<setw(3)<<c_marks<<setw(3)<<m_marks<<setw(3)<<
e_marks<<setw(3)<<cs_marks<<setw(6)<<setprecision(3)<<per<<"   "<<grade<<endl;
    }

    int  retrollno()
    {    return rollno;    }

};         //class ends here



//***************************************************************
//        global declaration for stream object, object
//****************************************************************

 fstream fp;
 student st;

//***************************************************************
//        function to write in file
//****************************************************************

void write_student()
{
    fp.open("student.dat",ios::out|ios::app);
    st.getdata();
    fp.write((char*)&st,sizeof(student));
    fp.close();
    cout<<"\n\nstudent record Has Been Created ";
    getch();
}

//***************************************************************
//        function to read all records from file
//****************************************************************


void display_all()
{
    clrscr();
    cout<<"\n\n\n\t\tDISPLAY ALL RECORD !!!\n\n";
    fp.open("student.dat",ios::in);
    while(fp.read((char*)&st,sizeof(student)))
    {
        st.showdata();
        cout<<"\n\n====================================\n";
         getch();
    }
        fp.close();
        getch();
}


//***************************************************************
//        function to read specific record from file
//****************************************************************


void display_sp(int n)
{
    int flag=0;
    fp.open("student.dat",ios::in);
    while(fp.read((char*)&st,sizeof(student)))
    {
        if(st.retrollno()==n)
        {
            clrscr();
            st.showdata();
            flag=1;
        }
    }
    fp.close();
    if(flag==0)
        cout<<"\n\nrecord not exist";
    getch();
}


//***************************************************************
//        function to modify record of file
//****************************************************************


void modify_student()
{
    int no,found=0;
    clrscr();
    cout<<"\n\n\tTo Modify ";
    cout<<"\n\n\tPlease Enter The roll number of student";
    cin>>no;   
    fp.open("student.dat",ios::in|ios::out);
    while(fp.read((char*)&st,sizeof(student)) && found==0)
    {
        if(st.retrollno()==no)
        {
            st.showdata();
            cout<<"\nPlease Enter The New Details of student"<<endl;
            st.getdata();
            int pos=-1*sizeof(st);
            fp.seekp(pos,ios::cur);
            fp.write((char*)&st,sizeof(student));
            cout<<"\n\n\t Record Updated";
            found=1;
        }
    }
        fp.close();
        if(found==0)
            cout<<"\n\n Record Not Found ";
        getch();
}


//***************************************************************
//        function to delete record of file
//****************************************************************


void delete_student()
{
    int no;
    clrscr();
        cout<<"\n\n\n\tDelete Record";
        cout<<"\n\nPlease Enter The roll number of student You Want To Delete";
        cin>>no;
        fp.open("student.dat",ios::in|ios::out);
        fstream fp2;
        fp2.open("Temp.dat",ios::out);
        fp.seekg(0,ios::beg);
        while(fp.read((char*)&st,sizeof(student)))
    {
        if(st.retrollno()!=no)
        {
            fp2.write((char*)&st,sizeof(student));
        }
    }
        fp2.close();
        fp.close();
        remove("student.dat");
        rename("Temp.dat","student.dat");
        cout<<"\n\n\tRecord Deleted ..";
        getch();
}


//***************************************************************
//        function to display all students grade report
//****************************************************************

void class_result()
{
    clrscr();
    fp.open("student.dat",ios::in);
         if(!fp)
         {
               cout<<"ERROR!!! FILE COULD NOT BE OPEN\n\n\n Go To Entry Menu to create File";
               cout<<"\n\n\n Program is closing ....";
               getch();
               exit(0);
         }
    cout<<"\n\n\t\tALL STUDENTS RESULT \n\n";
    cout<<"====================================================\n";
    cout<<"Roll No. Name          P  C  M  E  CS  %age Grade\n";
    cout<<"====================================================\n";
    while(fp.read((char*)&st,sizeof(student)))
    {
        st.show_tabular();
    }
         fp.close();
         getch();
}

//***************************************************************
//        function to display result menu
//****************************************************************

void result()
{
    int ans,rno;
        char ch;
        clrscr();
        cout<<"\n\n\nRESULT MENU";
        cout<<"\n\n\n1. Class Result\n\n2. Student Report Card\n\n3.Back to Main Menu";
        cout<<"\n\n\nEnter Choice (1/2)? ";
        cin>>ans;
        switch(ans)
        {
             case 1 : class_result();break;
             case 2 : {
               do{
                    clrscr();
                char ans;
                cout<<"\n\nEnter Roll Number Of Student : ";
                cin>>rno;
                display_sp(rno);
                cout<<"\n\nDo you want to See More Result (y/n)?";
                cin>>ans;
                 }while(ans=='y'||ans=='Y');
                break;
                   }
             case 3: break;
             default:  cout<<"\a";
        }
 }

//***************************************************************
//        INTRODUCTION FUNCTION
//****************************************************************

void intro()
{
    clrscr();
     gotoxy(35,11);
     cout<<"STUDENT";
     gotoxy(33,14);
     cout<<"REPORT CARD";
     gotoxy(35,17);
     cout<<"PROJECT";
     cout<<"\n\nMADE BY : Shakeer Shaik";
     cout<<"\n\nCOLLEGE : MITS college";
     getch();
}


//***************************************************************
//        ENTRY / EDIT MENU FUNCTION
//****************************************************************
void entry_menu()
{
      clrscr();
      char ch2;
      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) ";
      ch2=getche();
      switch(ch2)
      {
            case '1': clrscr();
                  write_student();
                  break;
            case '2': display_all();break;
            case '3':
                   int num;
                   clrscr();
                   cout<<"\n\n\tPlease Enter The roll number ";
                   cin>>num;
                   display_sp(num);
                   break;
              case '4': modify_student();break;
              case '5': delete_student();break;
              case '6': break;
              default:cout<<"\a";entry_menu();
       }
}


//***************************************************************
//        THE MAIN FUNCTION OF PROGRAM
//****************************************************************


void main()
{
      char ch;
      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) ";
          ch=getche();
          switch(ch)
          {
            case '1': clrscr();
                result();
                   break;
              case '2': entry_menu();
                    break;
              case '3':exit(0);
              default :cout<<"\a";
        }
        }while(ch!='3');
}

//***************************************************************
//                END OF PROJECT
//***************************************************************