Question

Question 1: Suppose you have to develop an information system for a popular restaurant chain. Points are added the customer depending on the purchases made. The customers are grouped based on number of points a. Create a class called Customer that includes attributes: id, name, points and group. b. Include set methods for id, and name attributes (id should only accept numbers and name should only accept alphabets) c. Include a constructor with parameters id and name. d. Include a method called addPoints, that is used to add a given amount to the value of the attribute points. e. Include a method called upgradePoints, that is used to increase the value of the attribute points by given percentage. f. Include a method called remove Points, that is used to reduce a given amount from the value of attribute points. If the value of the points is negative, then the value of the point attribute should be set to zero. g. Include a method called computeGroup, that assigns the value to the group attribute based on the value of the attribute points as given in the following table below Points Points < 100 100<=points<=500 500<=points<=2000 Points>2000 Group Silver Gold Platinum Diamond

Answer 1

Since you have not mentioned the language, I am providing the code in Java.

CODE

class Customer {

private String name, group;

private int id;

private double points;

public static boolean isAlpha(String s) {

return s != null && s.matches("^[a-zA-Z]*$");

}

public Customer(String name, int id) {

setId(id);

setName(name);

}

public void setName(String name) {

if (!isAlpha(name)) {

throw new IllegalArgumentException("Invalid name!!");

}

this.name = name;

}

public void setId(int id) {

this.id = id;

}

public void add(double p) {

points += p;

}

public void upgradePoints(double percentage) {

points += (percentage / 100) * points;

}

public void removePoints(double p) {

points -= p;

if (points < 0) {

points = 0;

}

}

public void computeGroup() {

if (points < 100) {

group = "Silver";

} else if (points <= 500) {

group = "Gold";

} else if (points <= 2000) {

group = "Platinum";

} else {

group = "Diamond";

}

}

}