Homework Answers

Write a C++ program that stores the grades of N students in an array of size 100. The

user must input at the beginning of the program the number of students N., then the

user must input the grade for each student. The program then must display the

following menu (use functions):

1. Print the minimum and maximum grade. (10 points)

2. Print the number of passing and failing students. (10 points)

3. Print the average grade, the percentage of passing students (grade >=70), and

the percentage of students that got a grade greater or equal to the average

grade. (15 points)

4. Exit. (5 points)

Consider following class Certification with following data members Id (int), name (String) ,hours(int),level (String),costPerHr (double). Provide a class StudentCertification that extends Certification. This class has an additional data member rebate (double). Override the calculateFee method so that the total cost is calculated by getting the total for the training hours @costPerHr and applying the rebate (%). E.g. if the costPerHr is 200 and 50 hours training and 0.2 rebate then the calculateFee should return 10000 – 0.2 *10000 = 8000. Provide another sub class ProfessionalCertification that extends Certification. This class no additional data member. It overrides calculateFee method so that total cost is returned as product of hours and cost per hour plus 15% tax of total hours cost. Also ProfessionalCertification implements Extendible Interface. You will also have to provide the implementation of method extend(int duration). For this you need to add the duration to training hours of the certification  

Write a method called sumFirstAndLastDigist() with one parameter of type int called number.

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The methods needs to find the first and Last digist of the parameter number passed to the method, using a loop and return the sum of the first and Last digis

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Here's an example:

Let's say you call sumFirstAndLastDigit(23456);

This should return 8 because 2 + 6 = 8

While taking a viva class teacher decides to take the viva of two roll numbers at a time.

For this she calls the roll numbers from roll numbers list as : one roll number from 1st nth roll number and 2nd roll number from the nth last roll number. For example if the numbers are : roll-num=[21,23,45,6,7,23,9,11,15,18] and n=3. One roll number calls 45 for viva and

second roll number called 11 for viva. Write a python function CRN(X, n) which take a list X and nth roll no. as input and returns 1st nth roll no. and 2nd roll no. from nth last roll no.

If nth roll number does not lie in range of the list the function will return "n not in range" in place of 1st roll no. and empty string " " in place of 2nd roll number. Give fixed input .