Code must in C++

Q1. Write a structure to store the roll no., score, name, age and address of 100 students. Score is another user defined structure which has member's subject1, subject2 and subject3. Store the information of the students. [10 Marks] a. Write a function to print the names of all the students having age between 18 and 22. b. Write another function to display the details of the student whose roll no is given (i.e. roll no. entered by the user)