SQL: SQL stands for “Structured Query Language”. The current version of SQL is “ANSI SQL – 92”. SQL is not a programming language. It is text-based and it is also called as data sublanguage. In order to get SQL as a complete programming language, it should be included in scripting languages like Java, C#, and so on. It contains constructs which are used to define and process database . They are executed using DBMS-supplied command prompt. Some of the DBMS products provide GUI tools in order to perform tasks are as follows: SQL Server Oracle Database MySQL Transaction Control Language (TCL): These statements are used to control transactions. The commands of TCL are: Commit, Rollback , and Savepoint. COMMIT: The “commit” keyword is used to save the recently inserted columns in the table and current transaction. It also makes permanent changes performed in the transaction. It comes under the control transactions commands. ROLLBACK: The “ROLLBACK” command can only be used to reverse transaction since last “ROLLBACK” or “COMMIT” command was supplied. The “ROLLBACK TRANSACTION” is used to reverse update that have not already been saved to the database in the SQL server.

Question

Change the following code so that there is always at least one way to get from the left corner to the top right, but the labyrinth is still randomized. The player starts at the bottom left corner of the labyrinth. He has to get to the top right corner of the labyrinth as fast he can, avoiding a meeting with the evil dragon. Take care that the player and the dragon cannot start off on walls. Also the dragon starts off from a randomly chosen position public class Labyrinth { private final int size; private final Cell[][] grid; public Labyrinth(int size) { this.size = size; this.grid = new Cell[size][size]; generateLabyrinth(); } private void generateLabyrinth() { Random rand = new Random(); for (int i = 0; i < size; i++) { for (int j = 0; j < size; j++) { // Randomly create walls and paths grid[i][j] = new Cell(rand.nextBoolean()); } } // Ensure start and end are…

Answer 1

Question

Chapter 6, Problem 8RQ

Program Plan Intro

SQL:

SQL stands for “Structured Query Language”.

The current version of SQL is “ANSI SQL – 92”.

SQL is not a programming language. It is text-based and it is also called as data sublanguage.

In order to get SQL as a complete programming language, it should be included in scripting languages like Java, C#, and so on.

It contains constructs which are used to define and process database. They are executed using DBMS-supplied command prompt.

Some of the DBMS products provide GUI tools in order to perform tasks are as follows:

SQL Server

Oracle Database

MySQL

Transaction Control Language (TCL):

These statements are used to control transactions. The commands of TCL are: Commit, Rollback, and Savepoint.

COMMIT:

The “commit” keyword is used to save the recently inserted columns in the table and current transaction.

It also makes permanent changes performed in the transaction.

It comes under the control transactions commands.

ROLLBACK:

The “ROLLBACK” command can only be used to reverse transaction since last “ROLLBACK” or “COMMIT” command was supplied.

The “ROLLBACK TRANSACTION” is used to reverse update that have not already been saved to the database in the SQL server.

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Change the following code so that there is always at least one way to get from the left corner to the top right, but the labyrinth is still randomized. The player starts at the bottom left corner of the labyrinth. He has to get to the top right corner of the labyrinth as fast he can, avoiding a meeting with the evil dragon. Take care that the player and the dragon cannot start off on walls. Also the dragon starts off from a randomly chosen position public class Labyrinth { private final int size; private final Cell[][] grid; public Labyrinth(int size) { this.size = size; this.grid = new Cell[size][size]; generateLabyrinth(); } private void generateLabyrinth() { Random rand = new Random(); for (int i = 0; i < size; i++) { for (int j = 0; j < size; j++) { // Randomly create walls and paths grid[i][j] = new Cell(rand.nextBoolean()); } } // Ensure start and end are…

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Make the following game user friendly with GUI, with some simple graphics. The GUI should be in another seperate class, with some ImageIcon, and Game class should be added into the pane. The following code works as this: The objective of the player is to escape from this labyrinth. The player starts at the bottom left corner of the labyrinth. He has to get to the top right corner of the labyrinth as fast he can, avoiding a meeting with the evil dragon. The player can move only in four directions: left, right, up or down. There are several escape paths in all labyrinths. The player’s character should be able to moved with the well known WASD keyboard buttons. If the dragon gets to a neighboring field of the player, then the player dies. Because it is dark in the labyrinth, the player can see only the neighboring fields at a distance of 3 units. Cell Class: public class Cell { private boolean isWall; public Cell(boolean isWall) { this.isWall = isWall; } public boolean isWall() { return…