Chapter 4 Exercises

/**
 * Pg 305 Number 2
 *
 * Zain Arfi
 * @version (a version number or a date)
 */
public class Pg305_2
{
   public static void main(String [] args)
   {
       String x = "hello";
       int y = 3;
       Count(x,y);
    }
   public static void Count( String x, int y)
   {
       for(int i = 1; i <= y; i++)
       {
           System.out.print(x);
        }
    }
}


Pg 305 Number 4
import java.util.*;
public class Pg305_4
{
    public static void main(String[] args)
    {
        Scanner console = new Scanner(System.in);
        System.out.println("What is the number of the month?");
        int x = console.nextInt();
        Days(x);
    }
    public static void Days(int x)
    {
        if(x == 1)
        {
            System.out.println("31");
        }
        else if(x == 2)
        {
            System.out.println("28");
        }
        else if(x == 3)
        {
            System.out.println("31");
        }
        else if(x == 4)
        {
            System.out.println("30");
        }
        else if(x == 5)
        {
            System.out.println("31");
        }
        else if(x == 6)
        {
            System.out.println("30");
        }
        else if(x == 7)
        {
            System.out.println("31");
        }
        else if(x == 8)
        {
            System.out.println("31");
        }
        else if(x == 9)
        {
            System.out.println("30");
        }
        else if(x == 10)
        {
            System.out.println("31");
        }
        else if(x == 11)
        {
            System.out.println("30");
        }
        else if(x == 12)
        {
            System.out.println("31");
        }
    }
}


Pg 306 Number 6
/**
 * Pg 306 # 6
 *
 * Zain Arfi
 * @version (a version number or a date)
 */
public class Pg306_6
{
    public static void printRange(int x, int y)
    {
        for(int number = x; number <= y; number++)
        {
            System.out.println(x);
        }
    }
}


/**
 * Pg 307 Number 10
 *
 * Zain Arfi
 * @version (a version number or a date)
 */
public class Pg306_10
{
    public static void printGPA(int a, int b, int c, int d)
    {
        int e = (a+b+c+d)/4;
        System.out.println("Maria's grade is" + e);
    }
}


/**
 * Pg 307 Number 12
 *
 * Zain Arf
 * @version (a version number or a date)
 */
public class Pg306_12
{
    public static void printTriType(int a, int b, int c)
    {
        if(a == b)
        {
            System.out.println("isoceles");
        }
        else if(b == c)
        {
            System.out.println("isoceles");
        }
        else if(a == b && b == c)
        {
            System.out.println("equilateral");
        }
        else
        {
            System.out.println("scalene");
        }
    }
}




/**
 * Pg 308 Number 16
 *
 * Z@in @rfi
 * @version (a version number or a date)
 */
public class Pg308_16
{
    public static void printPalindrome(String a)
    {
        for(int i=0; i <= a.length(a) + 1; i++)
        {
            if(a.charAt(i) == a.charAt(a.length(a)-i))
            {
                System.out.println("This is a palindrome!!");
            }
            else
            {
                System.out.println("This is not a palindrome!!");
            }
        }
    }
}



Pg 308 Number 20
public class Pg308_20
{
    public static void numUnique(int x, int y, int z)
    {
        if (x != y && x!=z && y != z)
        {
            System.out.println("3");
        }
        else if( x == y && y != z && x != z)
        {
            System.out.println("2");
        }
        else if(x == z && x != y && y != z)
        {
            System.out.println("2");
        }
        else if(y == z && x != z && y != x)
        {
            System.out.println("2");
        }
        else if (y == z && z == x && y == x)
        {
            System.out.println("0");
        }
        else
        {
            System.out.println("1");
        }
    }
}