floating point error

[robust]

My program is about student's result management.

Insert";
2.Search
3.Delete";
4.Modify";
5.Display all
It works well except for "display all" part..
initially i had input the marks of students in float but then i changed it into int form..but it still shows floating pt error..

display function:-
void display_studentfile()
{
student stud;
fstream fin("student.dat",ios::in|ios::binary);
if(fin==NULL)
{
cout<<"\n file doesn't exist";
return;
}
clrscr();
cout<<"\n\nStudent details are as shown below";
while(fin.read((char*)&stud,sizeof(student)))
{
stud.pdata();
}
fin.close();
}

pdata()------


void student::pdata()
{
cout<<"\n\nRollno:"<<rollno<<"\nName:"<<name;
cout<<"HALF YEARLY:\n";
for(int i=0;i<5;i++)
{ cout<<mh[i];
cout<<"\n";
}
cout<<"\nAnnual Exam:\n ";
for(i=0;i<5;i++)
{
cout<<ma[i];
cout<<"\n";
}
}

[weaknessforcats]

I suspect your file is not formatted correctly.

Also, why are you reading a file in a display function???

This display function cannever be used anywhere else unless the student data is in a student.dat.

Code that can't be used anywhere else should be in main(). When you find that your entire program is now in main(), you can suspect a function design problem.

In this case the display function should display the information for one student, which is passed in as an argument. That way, the display function can be used to display any student reagrdless of where the data is located.