#include<iostream.h>
#include<conio.h>
#include<fstream.h>
#include<stdio.h>
#include<string.h>

struct marklist
{
char sub[20];
int mark;
};
class Student
{
char name[20];
char clas[10];
char sec[10];
char roll[10];
struct marklist marks[5];
int total;
float per;
char div[5];
void calculate();
public:
Student();
void add_stud(char*,char*,char*,char*,struct marklist[]);
int disp_stud();
char* get_sub(int);
};
Student::Student()
{
strcpy(name,"");
strcpy(clas,"");
strcpy(sec,"");
strcpy(roll,"");
strcpy(marks[0].sub,"English: ");
strcpy(marks[1].sub,"Physics: ");
strcpy(marks[2].sub,"Chemistry: ");
strcpy(marks[3].sub,"Mathematics: ");
strcpy(marks[4].sub,"Comp.science/bio : ");
for(int i=0;i<5;i++)
marks[i].mark=0;
}

void Student::add_stud(char *n,char *c,char *s,char *r,struct marklist m[])
{
strcpy(name,n);
strcpy(clas,c);
strcpy(sec,s);
strcpy(roll,r);
for(int i=0;i<5;i++)
marks[i].mark=m[i].mark;
calculate();
}

int Student::disp_stud()
{
cout<<"\n_________________________________________________________________\n";
cout<<" Student Record";
cout<<"\n_________________________________________________________________\n";
cout<<"Name: "<<name<<" Class: "<<clas<<" Section: "<<sec<<" Roll No: "<<roll<<endl;
for(int i=0;i<5;i++)
cout<<marks[i].sub<<marks[i].mark<<endl;
cout<<"Total: "<<total<<" Percentage: "<<per<<" Division: "<<div<<endl;
cout<<endl<<endl<<endl<<endl<<endl;
cout<<"press any key to continue......";
getch();
clrscr();
return (1);
}
char* Student::get_sub(int i)
{
return marks[i].sub;
}
void Student::calculate()
{
total=0;
for(int i=0;i<5;i++)
total+=marks[i].mark;
per=(float)total/5;
if(per>60.0)
strcpy(div,"Ist");
else if(per>40.0 && per<60.0)
strcpy(div,"Pass");
else
strcpy(div,"Fail");
}


void main()
{
clrscr();
void add_rec(void);
void disp_rec(void);
cout.precision(2);
int choice=0;
gotoxy(20,10);
cout<<"THIS IS A PROJECT ON STUDENT MANAGEMENT SYSTEM ";
gotoxy(25,20);
cout<<"press any key to continue....";
getch();
while(choice!=3)
{ clrscr();
cout<<"\n Menu\n1. Add Student Details\n2. Display Student Details\n3. Exit\nSelect(1-3)\n";
cin>>choice;
switch(choice)
{
case 1:
add_rec();
break;
case 2:
disp_rec();
break;
case 3:
return;
default:
cout<<"Invalid Option\n";
}
}
}

void add_rec()
{
ofstream fout;
char name[20],clas[10],sec[10],roll[10],ans='y';
struct marklist marks[5];
Student student=Student();
fout.open("student.dat",ios::app|ios::binary);
while(ans=='y')
{
cout<<"Name: ";
cin.ignore();
cin.getline(name,20);
cout<<"Class: ";
cin.getline(clas,10);
cout<<"Section: ";
cin.getline(sec,10);
cout<<"Roll No: ";
cin.getline(roll,10);
cout<<"\nenter the marks for 5 subjects\n";
for(int i=0;i<5;i++)
{
cout<<student.get_sub(i);
cin>>marks[i].mark;
}
student.add_stud(name,clas,sec,roll,marks);
fout.write((char*)&student,sizeof(student));
cout<<"Add another student ?(y/n) ";
cin>>ans;
}
fout.close();
return;
}

void disp_rec()
{
ifstream fin;
Student student;
int count=0;
clrscr();
fin.open("student.dat",ios::binary);
while(fin.read((char*)&student,sizeof(student)))
count+=student.disp_stud();
fin.close();
if(count==0)
cout<<"No Student records\n";
return;
}