**15.15 (Geometry: add and remove points) Write a program that lets the user click on a pane to dynamically create and remove points (see Figure 15.30a). When the user left-clicks the mouse (primary button), a point is created and displayed at the mouse point. The user can remove a point by pointing to it and right- clicking the mouse (secondary button). Exercise15_15 Exercise15_16 187 FIGURE 15.30 (a) Exercise 15.15 allows the user to create/remove points dynamically. (b) Exercise 15.16 displays two vertices and a connecting edge.

**15.15 (Geometry: add and remove points) Write a program that lets the user click on a pane to dynamically create and remove points (see Figure 15.30a). When the user left-clicks the mouse (primary button), a point is created and displayed at the mouse point. The user can remove a point by pointing to it and right- clicking the mouse (secondary button). Exercise15_15 Exercise15_16 187 FIGURE 15.30 (a) Exercise 15.15 allows the user to create/remove points dynamically. (b) Exercise 15.16 displays two vertices and a connecting edge.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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4.27 LAB: Palindrome (JAVA) A palindrome is a word or a phrase that is the same when read both forward and backward. Examples are: "bob," "sees," or "never odd or even" (ignoring spaces). Write a program in java whose input is a word or phrase, and that outputs whether the input is a palindrome. Ex: If the input is: bob the output is: palindrome: bob Ex: If the input is: bobby the output is: not a palindrome: bobby Hint: Start by just handling single-word input, and submit for grading. Once passing single-word test cases, extend the program to handle phrases. If the input is a phrase, remove or ignore spaces. Code starts here: import java.util.Scanner; public class LabProgram { public static void main(String[] args) { /* Type your code here. */ }}
7.18 (Optional) Bubble sort: Write a sort method that uses the bubble-sort algorithm. The bubble-sort algorithm makes several passes through the array. On each pass, successive neighboring pairs are compared. If a pair is not in order, its values are swapped; otherwise, the values remain unchanged. The technique is called a bubble sort or sinking sort because the smaller values gradually "bubble" their way to the top and the larger values "sink to the bottom. Write a test program that reads in ten double numbers, invokes the method, and displays the sorted numbers.
7.13 LAB: Vending machine Given two integers as user inputs that represent the number of drinks to buy and the number of bottles to restock, create a VendingMachine object that performs the following operations: Purchases input number of drinks Restocks input number of bottles Reports inventory A VendingMachine's initial inventory is 20 drinks. Ex: If the input is: 5 2 the output is: Inventory: 17 bottles GIVEN: class VendingMachine: def __init__(self): self.bottles = 20 def purchase(self, amount): self.bottles = self.bottles - amount def restock(self, amount): self.bottles = self.bottles + amount def get_inventory(self): return self.bottles def report(self): print('Inventory: {} bottles'.format(self.bottles)) if __name__ == "__main__": # TODO: Create VendingMachine object # TODO: Purchase input number of drinks # TODO: Restock input number of bottles # TODO: Report inventory
1.9: DiamondWrite an application that prints the following diamond shape. Don’tprint any unneeded characters. (That is, don’t make any characterstring longer than it has to be.) (You may need to scroll to see everything.)***************************************** SAMPLE RUN #0: java Diamond
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6.3 Excercise # 3 Write a program that translates a letter grade into a number grade using a dictionary. Letter grades are A+, A, B+, B, C+, C, D+, D, and F. Their numeric values are 4.0, 3.75, 3.5, 3.0, 2.5, 2.0, 1.5, 1.0, and 0.0.
21.7 LAB: Login name (Use python) Write a program that creates a login name for a user, given the user's first name, last name, and a four-digit integer as input. Output the login name, which is made up of the first five letters of the last name, followed by the first letter of the first name, and then the last two digits of the number (use the % operator). If the last name has less than five letters, then use all letters of the last name. Ex: If the input is: Michael Jordan 1991 the output is: Your login name: JordaM91 Ex: If the input is: Kanye West 2024 the output is: Your login name: WestK24
22.4 LAB: Adjust list by normalizing - functions (Use Python) When analyzing data sets, such as data for human heights or for human weights, a common step is to adjust the data. This can be done by normalizing to values between 0 and 1, or throwing away outliers. For this program, adjust the values by subtracting the smallest value from all the values. Input values should be added to the list until -1 is entered. Ex: If the input is: 30 50 10 70 65 -1 the output is: 20 40 0 60 55 Your program must define and call the function:get_minimum_int(nums)
5.16 LAB: Cryptographic Hashing Algorithms Encryption methods, such as the Caesar Cipher encryption, allow us to encrypt and decrypt text using a special key. Another method of encrypting text / passwords is called hashing. Hashing uses special algorithms to 'scramble' the text, which is tougher to be hacked. The hash function can take numbers, letters, and symbols as input, then the function applies one of the special algorithms to output the scrambled text. The longer the output string is, the harder to hack the hashed data. The difference between hashing and the Caesar Cipher encryption is that one cannot 'decrypt' a hashed data to its original text. Since a hashed data cannot be decrypted, a user must enter the original text, which will be hashed by the program. Then the program compares the hashed value with the hashed data stored previously for the original text. A salt is used, at times, to create a random sequence that is added to the original text before using the hashing…
22.1 LAB: Toll calculations Toll roads have different fees at different times of the day and on weekends. Write a function CalcToll() that has three arguments: the current hour of time (int), whether the time is morning (bool), and whether the day is a weekend (bool). The function returns the correct toll fee (double), based on the chart below. Weekday Tolls Before 7:00 am ($1.15) 7:00 am to 9:59 am ($2.95) 10:00 am to 2:59 pm ($1.90) 3:00 pm to 7:59 pm ($3.95) Starting 8:00 pm ($1.40) Weekend Tolls Before 7:00 am ($1.05) 7:00 am to 7:59 pm ($2.15) Starting 8:00 pm ($1.10) Ex: The function calls below, with the given arguments, will return the following toll fees: CalcToll(8, true, false) returns 2.95CalcToll(1, false, false) returns 1.90CalcToll(3, false, true) returns 2.15CalcToll(5, true, true) returns 1.05 #include <iostream>#include <iomanip>using namespace std; double CalcToll(int hour, bool isMorning, bool isWeekend) { /* Type your code here */} int…
5.19 LAB: Adjust list by normalizing When analyzing data sets, such as data for human heights or for human weights, a common step is to adjust the data. This can be done by normalizing to values between 0 and 1, or throwing away outliers. For this program, adjust the values by dividing all values by the largest value. The input begins with an integer indicating the number of floating-point values that follow. Assume that the list will always contain less than 20 floating-point values. For coding simplicity, follow every output value by a space, including the last one. And, output each floating-point value with two digits after the decimal point, which can be achieved as follows:printf("%0.2lf ", yourValue); Ex: If the input is: 5 30.0 50.0 10.0 100.0 65.0 the output is: 0.30 0.50 0.10 1.00 0.65 The 5 indicates that there are five floating-point values in the list, namely 30.0, 50.0, 10.0, 100.0, and 65.0. 100.0 is the largest value in the list, so each value is divided by 100.0.…