Question

Write a function display() in ++ 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(); 

}