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\begin{document}

\title{CSC 1109 Lab 2}

\author{Woon Jun Wei, 2200624}

\date{\today}

\maketitle

\section*{Question 1}
Develop a program to accept the radius of one circle from the console and output
the area of the circle. Note that to compute the area, the following formula can be used: Area = radius * radius * PI
Define PI as a constant variable with a fixed value 3.14159

\begin{lstlisting}[label={list:first},caption=Question 1 Source Code.]
import java.util.*;

public class q1 {
    static final double PI = 3.14159;
    public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            System.out.print("Enter a number for radius: ");
            double radius = sc.nextDouble();
            double area = PI * radius * radius;
            System.out.println("The area for the circle of radius " + radius + " is " + area);
        }
}
\end{lstlisting}

\begin{lstlisting}[label={list:first_output},caption=Question 1 Output.]
Enter a number for radius: 2.5
The area for the circle of radius 2.5 is 19.6349375

Enter a number for radius: 23
The area for the circle of radius 23.0 is 1661.90111

Enter a number for radius: 7.3
The area for the circle of radius 7.3 is 167.41533109999997
\end{lstlisting}

\pagebreak

\section*{Question 2}
Average calculation for multiple input from keyboard: In this question, you will design a program to accept three number inputs by the user, and display the average of it.

\begin{lstlisting}[label={list:second},caption=Question 2 Source code.]
import java.util.*;

public class q1 {
    static final double PI = 3.14159;
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a number for radius: ");
        double radius = sc.nextDouble();
        double area = PI * radius * radius;
        System.out.println("The area for the circle of radius " + radius + " is " + area);

        }
}

\end{lstlisting}

\begin{lstlisting}[label={list:second_output},caption=Question 2 Output.]
Enter three numbers:10.5
11
11.5
The average of 10.5 11.0 11.5 is 11.0

Enter three numbers:1 2 3
The average of 1.0 2.0 3.0 is 2.0

Enter three numbers:10
11.5 19
The average of 10.0 11.5 19.0 is 13.5

\end{lstlisting}

\pagebreak

\section*{Question 3}

\begin{lstlisting}[label={list:third},caption=Question 3 Source Code.]
public class q3 {
    public static void main(String[] args) {
        long totalMilliseconds = System.currentTimeMillis();
        long totalSeconds = totalMilliseconds/1000;
        long currSecond = totalSeconds % 60;
        long totalMinutes = totalSeconds / 60;
        long currMinute = totalMinutes % 60;
        long totalHours = totalMinutes / 60;
        long currrHour = totalHours % 24;

        System.out.println("Current time is " + currrHour + ":" + currMinute + ":" + currSecond + " GMT");
    }
}
\end{lstlisting}

\begin{lstlisting}[label={list:third_output},caption=Question 3 Output.]
Current time is 6:49:27 GMT
\end{lstlisting}

\pagebreak

\section*{Question 4}
Chinese Zodiac Calculation: Now let us write a program to find out the Chinese Zodiac sign for
a given year. The Chinese Zodiac is based on a twelve-year cycle, with each year represented
by an animal- monkey, rooster, dog, pig, rat, ox, tiger, rabbit, dragon, snake, horse, or sheep—
in this cycle, as shown in Figure 2.
\\
Note that year \% 12 determines the Zodiac sign. 1900 is the year of the rat because 1900 \%
12 is 4. Listing 3.9 gives a program that prompts the user to enter a year and displays the

\begin{lstlisting}[label={list:fourth},caption=Question 4 Source Code.]
import java.util.*;

public class q4 {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter a year: ");
        int year = sc.nextInt();

        switch(year % 12){
        case 0:
        System.out.println("monkey");
        break;
        case 1:
        System.out.println("rooster");
        break;
        case 2:
        System.out.println("dog");
        break;
        case 3:
        System.out.println("pig");
        break;
        case 4:
        System.out.println("rat");
        break;
        case 5:
        System.out.println("ox");
        break;
        case 6:
        System.out.println("tiger");
        break;
        case 7:
        System.out.println("rabbit");
        break;
        case 8:
        System.out.println("dragon");
        break;
        case 9:
        System.out.println("snake");
        break;
        case 10:
        System.out.println("horse");
        break;
        case 11:
        System.out.println("sheep");
        break;
        default:
        System.out.println("Invalid input");
        break;
        }
    }
}

\end{lstlisting}

\begin{lstlisting}[label={list:fourth_output},caption=Question 4 Output.]
Enter a year: 1963
rabbit

Enter a year: 1877
ox

Enter a year: 2000
dragon
\end{lstlisting}

\end{document}