classes in C++

[punu]

write a program to display the roll.no,branch, and name of students using classes in C++

[JosAH]

write a program to display the roll.no,branch, and name of students using classes in C++

That was (part of) your assignment text with an emphasis on 'your' assignment
text; it implies that it isn't 'our' assignment text so you have to write it, not us.
What have you done sofar?

kind regards,

Jos