Question

USE JAVA PLEASE
And answer all questions

Question 5.1

1. Write a program that reads in a number n and then reads n strings. it then reads a string s from the user and gives you the word that was typed in after s.

Example input:

4

Joe

Steve

John

Mike

Steve

Example output:

John

Example input:

7

Up

Down

Left

Right

North

South

East

Right

Example output:

North

2. Remember to call your class Program

Question 5.2

1. Write a class called TeamTracker that is meant to keep track of the name and current league points accrued by a football team. It must have a constructor that accepts a team name and sets the current league points to zero. It must also have a method called win() which will increment the points by three, draw() which will increment the points by one and lose() which does nothing. It must also have a method called print() which prints out the team name followed by a colon, followed by their points.

2. The method header for the win method is shown below to help you.

public void win(){

3. You can make a main method in your TeamTracker class to test that it works, but the main method will not be marked.

3.1 Example main method

public static void main(String args[]){

TeamTracker t = new TeamTracker("Bafana");

t.win();

t.lose();

t.win();

t.draw();

t.print();

}

3.2 output

4

Bafana:7

Question 5.3

1. Write a class that will make the following code work:

public class Program{

public static void main(String args[]){

Example Output

} }

MarkCollector mc = new MarkCollector();

mc.addMark(14.2);

mc.addMark(34.7);

mc.addMark(10.1);

mc.addMark(34.9);

double av = mc.getAverageMark();

2. YouneedtocodetheMarkCollectorclass.Notethatitneedstostoremarks,andyoudon’tknow how many marks you are going to need to store. Consider using an ArrayList<Double> to store the marks.

3. You can use the Program class shown above to test your code. You can even include it in the zip file you submit to the marking system, but it will not be marked. Only your MarkCollector class will be marked.

4.1 Example Output

23.475

Answer 1

Question 5.1

import java.util.Scanner;
class Program
{
public static void main(String args[])
{
Scanner in=new Scanner(System.in); //creating Scanner class object for inputs
int n; //to store number of strings
System.out.print("Enter the value of n: "); //input prompt
n=in.nextInt(); //input
String arr[]=new String[n]; //creating array to store the Strings
System.out.println("Enter the strings: "); //input prompt
for(int i=0;i<n;i++)
arr[i]=in.next(); //input
String s; //to store the String s
System.out.print("Enter s: "); //input prompt
s=in.next(); //input
for(int i=0;i<n-1;i++) //we loop from 0 to n-2, since n-1 is the last element and there is not string after it
{
if(arr[i].equals(s))
{
System.out.println("String after "+s+" is "+arr[i+1]);
return;
}
}
System.out.println("No string found after "+s); //if program reaches this point, s was not found
}
}

Output:

Question 5.2

class TeamTracker
{
//class variables
String name;
int points;
TeamTracker(String name) //parametrized constructor
{
this.name=name;
this.points=0;
}
public void win() //function to add 3 points to total points for a win
{
this.points+=3;
}
public void draw() //function to add 1 point to total points for a draw
{
this.points+=1;
}
public void lose() //function to add 0 points to total points for a loss
{
this.points+=0;
}
public void print() //function to print team name and current points
{
System.out.println(name+": "+points);
}
public static void main(String args[])
{
//testing the class
TeamTracker t = new TeamTracker("Bafana");
t.win();
t.lose();
t.win();
t.draw();
t.print();
}
}

Output:

Question 5.3

class MarkCollector
{
//class variables
double total;
int count;
MarkCollector() //default constructor
{
total=0.0;
count=0;
}
void addMark(double marks) //function to add a mark to the list
{
total+=marks; //adding a mark to the total
count++; //incrementing count
}
double getAverageMark() //function to return average of marks
{
if(count!=0)
return total/count;
return 0.0;
}
public static void main(String args[])
{
//testing the class
MarkCollector mc = new MarkCollector();
mc.addMark(14.2);
mc.addMark(34.7);
mc.addMark(10.1);
mc.addMark(34.9);
double av=mc.getAverageMark();
System.out.println(av);
}
}

Output: