15.A program to demonstrate how to read data from an array of nested class objects from the keyboard and to write it in a specified file. 16.A program to demonstrate how to read a character from a...

15.A program to demonstrate how to read data from an array of nested class objects from the keyboard and to write it in a specified file.

16.A program to demonstrate how to read a character from a random access file using seekg() method.

17.A program to read a class object of student_info such as name, roll number, sex, age, height and weight from the keyboard and to store them on a specified file using write() member functions.

18.A program to demonstrate how to read a class object of student_info such as name, roll number, sex, age, height and weight from a random access file using seekg() method.