Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 7, Problem 7.25PE
(Algebra: solve quadratic equations) Write a method for solving a quadratic equation using the following header:
public static int solveQuadratic(double[] eqn, double[] roots)
The coefficients of a quadratic equation ax2 + bx + c = 0 are passed to the array eqn and the real roots are stored in roots. The method returns the number of real roots. See
Write a program that prompts the user to enter values for a, b, and c and displays the number of real roots and all real roots.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
(Average the major diagonal in a matrix) Write a method that averages all the numbers in the major diagonal in an n * n matrix of double values using the following header:
public static double averageMajorDiagonal(double[][] m)
Write a test program that reads a 4-by-4 matrix and displays the average of all its elements on the major diagonal. Here is a sample run:
1 2 3 4.0
5 6.5 7 8
9 10 11 12
13 14 15 16
Average of the elements in the major diagonal is 8.625
(Intro to Java)
Explain the answers to the below questions. include a written answer to the question using step-by-step explanation
4. Write the linearSearch method as follows using the algorithm provided in class:
The method is named linearSearch
It takes on array of doubles as a parameter
It takes a double value to locate in the array as a second parameter
It returns the integer location (index) in the array where the value is located
Or, it returns -1 if the value cannot be found
(Sum elements row by row) Write a method that returns the sum of all the elements in a specified row in a matrix using the following header:
public static double sumRow(double[][] m, int rowIndex)
Write a test program that reads a 3-by-4 matrix and displays the sum of each row. Here is a sample run:
Chapter 7 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 7.2 - Prob. 7.2.1CPCh. 7.2 - Prob. 7.2.2CPCh. 7.2 - What is the output of the following code? int x =...Ch. 7.2 - Indicate true or false for the following...Ch. 7.2 - Which of the following statements are valid? a....Ch. 7.2 - Prob. 7.2.6CPCh. 7.2 - What is the array index type? What is the lowest...Ch. 7.2 - Write statements to do the following: a. Create an...Ch. 7.2 - What happens when your program attempts to access...Ch. 7.2 - Identify and fix the errors in the following code:...
Ch. 7.2 - What is the output of the following code? 1....Ch. 7.4 - Will the program pick four random cards if you...Ch. 7.5 - Use the arraycopy method to copy the following...Ch. 7.5 - Prob. 7.5.2CPCh. 7.7 - Suppose the following code is written to reverse...Ch. 7.8 - Prob. 7.8.1CPCh. 7.8 - Prob. 7.8.2CPCh. 7.9 - Prob. 7.9.1CPCh. 7.9 - Prob. 7.9.2CPCh. 7.10 - If high is a very large integer such as the...Ch. 7.10 - Prob. 7.10.2CPCh. 7.10 - Prob. 7.10.3CPCh. 7.11 - Prob. 7.11.1CPCh. 7.11 - How do you modify the selectionSort method in...Ch. 7.12 - What types of array can be sorted using the...Ch. 7.12 - To apply java.util.Arrays.binarySearch (array,...Ch. 7.12 - Show the output of the following code: int[] list1...Ch. 7.13 - This book declares the main method as public...Ch. 7.13 - Show the output of the following program when...Ch. 7 - (Assign grades) Write a program that reads student...Ch. 7 - (Reverse the numbers entered) Write a program that...Ch. 7 - (Count occurrence of numbers) Write a program that...Ch. 7 - (Analyze scores) Write a program that reads an...Ch. 7 - (Print distinct numbers) Write a program that...Ch. 7 - (Revise Listing 5.1 5, PrimeNumber.java) Listing...Ch. 7 - (Count single digits) Write a program that...Ch. 7 - (Average an array) Write two overloaded methods...Ch. 7 - (Find the smallest element) Write a method that...Ch. 7 - Prob. 7.10PECh. 7 - (Statistics: compute deviation) Programming...Ch. 7 - (Reverse an array) The reverse method in Section...Ch. 7 - Prob. 7.13PECh. 7 - Prob. 7.14PECh. 7 - 7 .15 (Eliminate duplicates) Write a method that...Ch. 7 - (Execution time) Write a program that randomly...Ch. 7 - Prob. 7.17PECh. 7 - (Bubble sort) Write a sort method that uses the...Ch. 7 - (Sorted?) Write the following method that returns...Ch. 7 - (Revise selection sort) In Listing 7 .8, you used...Ch. 7 - (Sum integers) Write a program that passes an...Ch. 7 - (Find the number of uppercase letters in a string)...Ch. 7 - (Game: locker puzzle) A school bas 100 lockers and...Ch. 7 - (Simulation: coupon collectors problem) Coupon...Ch. 7 - (Algebra: solve quadratic equations) Write a...Ch. 7 - (Strictly identical arrays) The arrays 1ist1 and...Ch. 7 - (Identical arrays) The arrays 1ist1 and 1ist2 are...Ch. 7 - (Math: combinations) Write a program that prompts...Ch. 7 - (Game: pick four cards) Write a program that picks...Ch. 7 - (Pattern recognition: consecutive four equal...Ch. 7 - (Merge two sorted Lists) Write the following...Ch. 7 - (Partition of a list) Write the following method...Ch. 7 - Prob. 7.33PECh. 7 - (Sort characters in a string) Write a method that...Ch. 7 - (Game: hangman) Write a hangman game that randomly...Ch. 7 - (Game: Eight Queens) The classic Eight Queens...Ch. 7 - Prob. 7.37PE
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
What is the difference between System.out.println and System,out.print ?
Absolute Java (6th Edition)
Drivers License Exam The State Department of Motor Vehicles (DMV) has asked you to write a program that grades ...
Starting Out with C++: Early Objects (9th Edition)
What, if anything, is wrong with the following #include directives? a.#include iostream b.#include iostream c....
Problem Solving with C++ (10th Edition)
A file that contains a Flash animation uses the __________ file extension. a. .class b. .swf c. .mp3 d. .flash
Web Development and Design Foundations with HTML5 (8th Edition)
Type in and run the six programs presented in this chapter. Compare the output produced by each program with th...
Programming in C
Kinetic Energy In physics, an object that is in motion is said to have kinetic energy. The following formula ca...
Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- (Sum elements row by row) write a method that returns the sum of all the elements in a specified row in a matrix using the following header: public static double sumRow(double [][] m, int rowIndex) Write a test program that reads a 3-by-4 matrix and displays the sum of each row here is a sample run.arrow_forward(Find the index of the largest element) Write a function that returns the index of the largest element in an array of integers. If there are more such elements than one, return the largest index. Use the following header: int indexOfLargestElement(double array[], int size)arrow_forward[In c#] Write a class with name Arrays . This class has an array which should be initialized by user.Write a method Sum that should sum even numbers in array and return sum. write a function with name numFind in this class with working logic as to find the mid number of an array. After finding this number calculate its factorial.Write function that should display sum and factorial.Don’t use divide operatorarrow_forward
- (Random sentences and story writer) Write an app that uses random-number generation to create sentences. Use four arrays of strings, called article, noun, verb andprepostion. Create a sentence by selecting a word at random from each array in the following order: article, noun, verb, preposition, article, noun.As each word is picked, concatenate it to the previous words in the sentence. The words should be separated by spaces. When the sentence is output, it should start witha capital letter and end with a period. The program should generate 10 sentences and output them to a text box. The arrays should be filled as follows:The article array should contain the articles "the", "a", "one", "some" and "any";The noun array should contain the nouns "boy", "girl", "dog", "town", "car";The verb array should contain the past tense verbs "drove", "jumped", "ran", "walked" and "skipped";The preposition array should contain the preposotions "to", "from", "over", "under" and "on";arrow_forward(Java in Eclipse) Write code that finds the sum of two matrices. Use the following method header public static int[][] addMatrix(int[][] a, int[][] b) The rules for adding two matrices are:1. both matrices should have the exact same dimensions (i.e. height and width) – you need to check for this rule in your program.2. both matrices should have elements that have compatible types – you don’t have to add extra code to check this rule in your method as it will only accept int arrays included is a test class and a sample runarrow_forward(Airplane Seating Assignment) | Write a program that can be used to assign seats for a commercial airplane. The airplane has 13 rows, with six seats in each row. Rows 1 and 2 are first class, rows 3 through 7 are business class, and rows 8 through 13 are economy class. Use two parallel arrays: a one-dimensional array to store the row number of the seats (Row #) a two-dimensional array of 13 rows and 6 columns to store the seat assignments (*) and seat letters (A-F) Your program must prompt the user to enter the following information: Reserve a seat (Yes (Y/y) or No (N/n)) Assign ticket type (first class (F/f), business class (B/b), or economy class (E/e)) Select desired seat (1-13 and A-F) Your program must contain at least the following functions: a function to initialize the seat plan. a function to show the seat assignments. a function to show the menu to assign a seat. a function to assign and select your desired seat. a function for each ticket type that determines if a seat…arrow_forward
- (Airplane Seating Assignment) | Write a program that can be used to assign seats for a commercial airplane. The airplane has 13 rows, with six seats in each row. Rows 1 and 2 are first class, rows 3 through 7 are business class, and rows 8 through 13 are economy class. Use two parallel arrays: a one-dimensional array to store the row number of the seats (Row #) a two-dimensional array of 13 rows and 6 columns to store the seat assignments (*) and seat letters (A-F) Your program must prompt the user to enter the following information: Reserve a seat (Yes (Y/y) or No (N/n)) Assign ticket type (first class (F/f), business class (B/b), or economy class (E/e)) Select desired seat (1-13 and A-F) Your program must contain at least the following functions: a function to initialize the seat plan. a function to show the seat assignments. a function to show the menu to assign a seat. a function to assign and select your desired seat. a function for each ticket type that determines if a seat…arrow_forward(Airplane Seating Assignment) | Write a program that can be used to assign seats for a commercial airplane. The airplane has 13 rows, with six seats in each row. Rows 1 and 2 are first class, rows 3 through 7 are business class, and rows 8 through 13 are economy class. Use two parallel arrays: a one-dimensional array to store the row number of the seats (Row #) a two-dimensional array of 13 rows and 6 columns to store the seat assignments (*) and seat letters (A-F) Your program must prompt the user to enter the following information: Reserve a seat (Yes (Y/y) or No (N/n)) Assign ticket type (first class (F/f), business class (B/b), or economy class (E/e)) Select desired seat (1-13 and A-F) Your program must contain at least the following functions: a function to initialize the seat plan. a function to show the seat assignments. a function to show the menu to assign a seat. a function to assign and select your desired seat. a function for each ticket type that determines if a seat…arrow_forward(Algebra: perfect square ) Write a program that prompts the user to enter an integer m and find the smallest integer n such that m * n is a perfect square. (Hint: Store all smallest factors of m into an array list. n is the product of the factors that appear an odd number of times in the array list. For example, consider m = 90, store the factors 2, 3, 3, 5 in an array list. 2 and 5 appear an odd number of times in the array list. So, n is 10.) Sample Run 1 Enter an integer m: 1500 The smallest number n for m x n to be a perfect square is 15 m x n is 22500 Sample Run 2 Enter an integer m: 63 The smallest number n for m x n to be a perfect square is 7 m x n is 441 Class Name: Exercise11_17 Answer is : import java.util.Scanner; public class Squares { public static void main(String[] args) { Scanner scan = new Scanner(System.in); //instantiation of Scanner that will take inputs from the keyboard //the try catch block below is for trapping error with the input try {…arrow_forward
- (Locate the largest element) Write the following function that finds the location of the largest element in a two-dimensional array. void 1ocateLargest(const double a[][4 ], int 1ocation[]) The location is stored in a one-dimensional array location that contains two elements. These two elements indicate the row and column indices of the largest element in the two-dimensional array. Write a test program that prompts the user to enter a 3 × 4 two-dimensional array and displays the location of the largest element in the array.arrow_forwardQuestion 3 : (Eliminate duplicates) Write a program Duplicate.java that reads in ten integers in an array T, creates a new array V by eliminating the duplicate values in the array, and displays the result. Here is the sample run of the program: Enter ten numbers: 1 2 3 2 1 6 3 4 5 2 The distinct numbers are: 1 2 3 6 4 5arrow_forward(Check test scores) The answers to a true-false test are as follows: T T F F T. Given a two-dimensional answer array, in which each row corresponds to the answers provided on one test, write a function that accepts the two-dimensional array and number of tests as parameters and returns a one-dimensional array containing the grades for each test. (Each question is worth 5 points so that the maximum possible grade is 25.) Test your function with the following data: int score = 0;arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill Education
Starting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSON
Digital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSON
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Programmable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education
Program to find HCF & LCM of two numbers in C | #6 Coding Bytes; Author: FACE Prep;https://www.youtube.com/watch?v=mZA3cdalYN4;License: Standard YouTube License, CC-BY