Question

Write a function display () in C++ to display all the students who have got a distinction(scored percentage more than or equal to 75) from a binary file “stud.dat”, assuming the binary file is containing the objects of the following class:

class student

{

int rno;

char sname [20];

int percent;

public:

int retpercent()

{

return percent;

}

void getdetails()

{

cin>>rno;

gets(sname);

cin>>percent;

}

void showdetails()

{

cout<<rno;

puts(sname);

cout<<percent;

}

};

Answer 1

void display()

{

student s;

ifstream i(“stud.dat”);

while(i.read((char*)&s,sizeof(s)))

{

if(s.retpercent()>=75)

s.showdetails();

}

i.close();

}