Student Marksheet Project In C++

//***************************************************************
//                   HEADER FILE USED IN PROJECT
//****************************************************************

#include<fstream.h>
#include<iomanip.h>
#include<stdio.h>
#include<conio.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;
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();
}; //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 ";
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)<<c_marks<<setw(4)<<m_marks<<setw(4)
<<e_marks<<setw(4)<<cs_marks<<setw(4)<<per<<setw(4)<<" "<<grade<<endl;
}

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


//***************************************************************
//    function declaration
//****************************************************************


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


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



int main()
{
char 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':
break;
default :cout<<"\a";
}
    }while(ch!='3');
return 0;
}

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

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();
}

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

void display_all()
{
student st;
ifstream inFile;
inFile.open("student.dat",ios::binary);
if(!inFile)
{
cout<<"File could not be open !! Press any Key...";
getch();
return;
}
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();
}

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

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...";
getch();
return;
}

int flag=0;
while(inFile.read((char *) &st, sizeof(student)))
{
if(st.retrollno()==n)
{
st.showdata();
flag=1;
}
}
inFile.close();
if(flag==0)
cout<<"\n\nrecord not exist";
getch();
}

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

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...";
getch();
return;
}
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;
}
}
File.close();
if(found==0)
cout<<"\n\n Record Not Found ";
getch();
}

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

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...";
getch();
return;
}
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();
}

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

void class_result()
{
student st;
ifstream inFile;
inFile.open("student.dat",ios::binary);
if(!inFile)
{
cout<<"File could not be open !! Press any Key...";
getch();
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((char *) &st, sizeof(student)))
{
st.show_tabular();
}
getch();
inFile.close();
}

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

void result()
{
char 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====> ";
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' :break;
default :cout<<"\a";
}
}

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

void intro()
{
cout<<"\n\n\n\t\t  STUDENT";
cout<<"\n\n\t\tREPORT CARD";
cout<<"\n\n\t\t  PROJECT";
cout<<"\n\n\n\tMADE BY : AVINASH BHAGAT";
cout<<"\n\tCOLLEGE : ST.XAVIER'S COLLEGE";
getch();
}

//***************************************************************
//    ENTRY / EDIT MENU FUNCTION
//****************************************************************

void entry_menu()
{
char 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': break;
default: cout<<"\a"; entry_menu();
}
}




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