Exercise (5): Strings A. String Length method public class MyClass { public static void main(String[] args) { String txt "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; System.out.println("The length of the txt string is: " + txt.length ()); ) } B. Uppercase and Lowercase methods public class MyClass { public static void main(String[] args) { String txt = "Hello World"; System.out.println(txt.toUpperCase ()); // Outputs "HELLO WORLD" System.out.println(txt.toLowerCase()); // Outputs "hello world" }} C. String concatenation The + operator can be used between strings to combine them. This is called concatenation. You can also use the concat() method to concatenate two strings public class MyClass { public static void main(String[] args) { String firstName = "Amani"; String fatherName = "Sabri"; System.out.println(firstName + "" System.out.println(firstName.concat (fatherName)); }} + fatherName);

Fibonacci A fibonacci sequence is a series of numbers in which each number is the sum of the two preceding numbers. For example: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on…    For this, you will implement a class that takes a positive integer (n) and returns the number in the nth position in the sequence. Examples When n is 1, the returned value will be 0. When n is 4, the returned value will be 2. When n is 9, the returned value will be 21.   come up with the formula and base cases  Implementation Create a class Fibonacci with a public static method getValue. Create a Main class to test and run your Fibonacci class.

Don't delete the code. Fix the error and make sure it runs. #include using namespace std; class Puzzle { public: char arr[4][4] // constructor Puzzle() {  char arr[4][2]  = {'f', 'k', 's','s'}                                  {'b', 'j', 'o','u'}                                 {'b', 'o', 'b', 'n'}                                  {'x', 'y', 'w', 'y'} } // destructor ~Puzzle() { } // print method void print() { for (int i=0; i> word; if (p.search(word)) cout << "The word is found in the puzzle." << endl; else cout << "The word is not found in the puzzle." << endl; return 0; }

Q: What's a better way to write this? (C#) public string SomeMethod(string OriginalZip) { string zip = "Zip Not Available"; zip = GetZip(zip, OriginalZip); return zip; } private static string GetZip(string zip, string OriginalZip) { int zipLength = (OriginalZip.HasValue) ? OriginalZip.Value.ToString().Length: 0; int NumOf Leading Zeroes = (zipLength > O && zipLength < 5) ? 5 - zipLength: 0; if (OriginalZip.HasValue) { i++) } zip = OriginalZip.Value.ToString(); for (int i = 0; i < NumOf Leading Zeroes; { } zip = "0" + zip; } return zip;

Practice / Frequency of Characters Write a method that returns the frequency of each characters of a given String parameter. If the given String is null, then return null If the given String is empty return an empty map Example input: output: empty map explanation: input is empty Example input: null output: null explanation: input is null. Since problem output is focused on the frequency we can comfortably use Map data structure. Because we can use characters as key and the occurrences of them as value. Example input: responsible output: {r=1, e=2, s=2, p=1, o=1, n=1, i=1, b=1, l=1} explanation: characters are keys and oc values ences are

Enhanced selection sort algorithm SelectionSortDemo.java  package chapter7; /** This program demonstrates the selectionSort method in the ArrayTools class. */ public class SelectionSortDemo { public static void main(String[] arg) { int[] values = {5, 7, 2, 8, 9, 1}; // Display the unsorted array. System.out.println("The unsorted values are:"); for (int i = 0; i < values.length; i++) System.out.print(values[i] + " "); System.out.println(); // Sort the array. selectionSort(values); // Display the sorted array. System.out.println("The sorted values are:"); for (int i = 0; i < values.length; i++) System.out.print(values[i] + " "); System.out.println(); } /** The selectionSort method performs a selection sort on an int array. The array is sorted in ascending order. @param array The array to sort. */ public static void selectionSort(int[] array) { int startScan, index, minIndex, minValue; for (startScan = 0; startScan < (array.length-1); startScan++) { minIndex = startScan; minValue…

using System;class TicTacToe{  static void Print(char[] board)  {    Console.WriteLine();    Console.WriteLine($" {board[0]} | {board[1]} | {board[2]} ");    Console.WriteLine($" {board[3]} | {board[4]} | {board[5]} ");    Console.WriteLine($" {board[6]} | {board[7]} | {board[8]} ");    Console.WriteLine();  }  static void Main(string[] args)  {    char[] board = new char[9];    for (int i = 0; i < 9; i = i + 1)    {      board[i] = ' ';    }    Print(board);    board[4] = 'X';    Print(board);    board[0] = 'O';    Print(board);    board[3] = 'X';    Print(board);    board[5] = 'O';    Print(board);    board[6] = 'X';    Print(board);    board[2] = 'O';    Print(board);  }}   Hello! This program is in C# could a line of code be added to ask the user if they want to be "X" or if they want to be "O"?

using System; class TicTacToe { staticint player = 1; staticint choice; staticvoid Print( char[] board); staticvoid Main(string[] args) { Console.WriteLine(); Console.WriteLine($" {board[0]} | {board[1]} | {board[2]} "); Console.WriteLine($" {board[3]} | {board[4]} | {board[5]} "); Console.WriteLine($" {board[6]} | {board[7]} | {board[8]} "); Console.WriteLine(); } staticvoid Main(string[] args) { char[] board = newchar[9]; for (int i = 0; i < 9; i = i + 1) { board[i] = ' '; if( board[i]== 'O') Console.Write("It is your turn to place an X"); } Print(board); board[4] = 'X'; Print(board); board[0] = 'O'; Print(board); board[3] = 'X'; Print(board); board[5] = 'O'; Print(board); board[6] = 'X'; Print(board); board[2] = 'O'; Print(board); } }   Hello! I need help with getting my code to compile. It's written in C# and i'm a beginner. it's giving me two errors and i'm not sure how to fix them. Please don't copy paste an answer from google.

public class Program7 {   publicstaticvoidmain(String[]args){ int[]numbers=newint[100]; String[]names={"Maria","Aris","Galin","Galena"}; double[]balances=newdouble[]{2,56,12.57,36.57,57.89};   //length System.out.println(numbers.length); System.out.println(names.length); System.out.println(balances.length);   //modifying names[3]="Celine Dion"; System.out.println("__________________________");   //looping for(inti=0;i<names.length;i++){ System.out.println(names[i]); } System.out.println("__________________________"); for(Stringname:names){ System.out.println(name); }   //modifying array System.out.println("__________________________"); for(inti=0;i<names.length;i++){ names[i]=names[i]+" Annan"; System.out.println(names[i]); }   System.out.println("__________________________"); doubletotal=0.0; for(inti=0;i<balances.length;i++){ total+=balances[i];   }   System.out.println("Total Balance: "+ total); } } //calculate the average of the total balance

class Container {private int val1=1;private void printValue(){final int val2=2;class Containee{public void f(){System.out.println(String.format("Values are: %d and %d."),val1);}}}public static void main(String[] args) {(new Container()).printValue();}}   a.The above does not compile because the method f() requires an instance of class Container b.The above does not compile because the class definition in done within the body of the function c.The above code complies with no errors, but does not produce any ouput d.The above code does not compile because the methodf() cannot access the variable val1