assignment 6 array statistics project stem

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Answer key for APCSA Edhesive 2020 - learn from example, don't plagiarize.

Jovakan/apcsa2020

Folders and files, repository files navigation, ap computer science a 2020 (edhesive).

This repository is organized into the units and lessons inside them. You will also find the assignments but you will find no answers to any of the reviews, quizzes, or exams. Labs assigned by the College Board do NOT follow the uniform formatting and their directory is named after the actual name for ease of search outside of Edhesive users.

I will update this after my class is finished with one lesson. If you have any questions, comments, or additions, feel free to contact my Discord. Good luck!

Path format: [Unit#]/[Lesson#]/[Unit#][Lesson#][Question#].java

Unit 1: Primitive Types

Lessons 1-6

Assignment 1: Movie Ratings

Unit 2: Using Objects

Lessons 1-8

Assignment 2: Control Tower

Unit 3: Boolean Expressions and If Statements

Lessons 1-7

Assignment 3: Crack the Code!

Unit 4: Iteration

Assignment 4: String Shortener

Lab: Consumer Review

Unit 5: Writing Classes

Lessons 1-9

Assignment 5: Fraction

Unit 6: Array

Lessons 1-5

Assignment 6: Array Statistics

Unit 7: ArrayList

Assignment 7: Game Wheel

Lab: Data Lab

Unit 8: 2-D Arrays

Lessons 1-2

Assignment 8: Battleship

Lab: Steganography

Unit 9: Inheritance

Lessons 1-3

Assignment 9: Ultimate Frisbee

Lab: Celebrity

Unit 10: Recursion

Lessons 1-4

Assignment 10: Anagrams

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# Project Stem

Source code for the 2022-23 AP Computer Science A course on Project Stem.

# 📃 About

This page contains the source code to various problems on Project Stem. Organized by unit, you will find the necessary activity files to be compiled by the Java environment, as well as runner files provided by Project Stem to test execution (when available).

The provided source code is intended to work with the 2023 AP CS A course. These solutions may grow out-of-date as new changes are made to the course every year.

# Table of Contents

• Unit 1: Primitive Types
• Unit 2: Using Objects
• Unit 3: Boolean Expressions and If Statements
• Unit 4: Iteration
• Unit 5: Writing Classes
• Unit 6: Array
• Unit 7: ArrayList
• Unit 8: 2D Array
• Unit 9: Inheritance
• Unit 10: Recursion

# 📝 Contributing

Notice a typo or error? Feel free to create an issue !

Please note that support will not be provided for code that does not work in newer lessons.

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CS 150, Fall 2017

Programming assignment - p6, use for loops to determine statistics of arrays and manipulate strings, due - october 24th, 2017 at 6:00pm, late - october 25th, 2017 at 8:00am, objectives of this assignment.

• Write a program that calculates statistics of two different arrays and two Strings, and
• do so by utilizing for loops to access array elements or characters of Strings.

Instructions

Create a Java program called P6 with a class named P6, which after created should contain a file named P6.java in the src folder. All of the Java code you write should be contained in the main method. The goals of this program are as follows: (1) determine number of even and odd values in an integer array; (2) determine the average, maximum, and minimum number of home runs Babe Ruth hit in the last ten years of his professional career; (3) count the number of vowels in a predefined String; and (4) remove all of the digits from a predefined String. For this assignment, you must follow the directions for output formatting below exactly:

• Declare and initialize an integer array with space to hold five elements - these will be integer values.
• Declare another integer array and initialize with the following values: 47, 60, 54, 46, 49, 46, 41, 34, 22, and 6. These ten values are the number of home runs Babe Ruth hit each year over a period of ten years - this should help you name your array with a name that is easy to track throughout your program.
• Next, you will need to declare and initialize three Strings. The first String object should hold the following sentence: "The band includes a guitar and a tambourine." The second String object should hold the following sentence: "At 3:16pm on October 11th 2017, the world population was 7,573,517,788." The third String should be initialized to the empty string and will, after your program executes, hold the characters in the second String that are not digits.
• Declare and initialize a Scanner object to read from the keyboard.
• counter for number of even letters
• counter for number of odd letters
• average number of home runs
• maximum number of home runs
• minimum number of home runs
• total number of home runs
• counter for number of vowels in a String
• For the first part of this program, you will write a loop to iterate over the empty integer array.
• Inside this loop, print out the following prompt first:
• Next, use your Scanner object to initialize one element of the array to an integer entered by the user. The location in the array the user's value is initialized to should change with each loop - in effect, what variable do you already have within your for loop that you can also use as the location accessor when initializing the elements of your array?
• After the end of this for loop, print a blank line to the console.
• Now, write a second for loop that iterates over the array your code just initialized and determines the number of even and odd values in the array. To do this, think about what math operator we have seen that will help determine whether a value is even or odd. Do not forget the difference when it comes to math with integers and math with doubles as peformed by computers.
• Print the results after the following two prompts:
• First assign the variables for maximum and minimum number of home runs to the value in the first element of the home run array.
• Next, write another for loop to iterate over the home run array.
• First, write a line of code that successively adds each value in the array to the variable representing the total number of home runs. Each time the for loop iterates, you will add the value in the next element to the total.
• Second, using a conditional, check if the current element in the array is greater than the value in the maximum home runs variable. If so, reassign maximum home runs to be the value at the current array location.
• Third, using another conditional, check if the current element in the array is less than the value in the minimum home runs variable. If so, reassign minimum home runs to be the value at the current array location.
• Next, outside of the for loop, calculate the average number of home runs and assign that value to the appropriate variable.
• Lastly, print the home run statistics to the console in the following format:
• Your fourth for loop will count the number of vowels in the first String of this project (defined above). To do this, you should write a for loop that iterates over the first String described above and write a switch block inside the for loop.
• Implement your switch block to switch on one character of the String per loop iteration. It is recommended that your cases be the vowel letters (do not include y as a vowel) . Do not forget about flow through if several cases perform the same process in a program. Also, it may seem odd, but your default case does not actually have to do anything; so do not get caught up trying to figure out what it is supposed to do if you implement the solution to this problem in previous cases.
• Next, write the fifth for loop to iterate over the second String (defined above).
• In this for loop you will gradually build a new String using the String object currently containing only the empty string.
• This loop with utilize one of the Character wrapper class methods simultaneously with a conditional. The link to the Oracle document on the Character class, which has everything defined in this class, can be found here .
• When building a new String without any of the digits currently in the second String, one of your conditional cases will not actually do anything; so you may leave its braces empty or use continue .
• Note: When you create the resulting String you can negate the first conditional statement and build the new String within the first conditional, or build the new String as your default condition. Either way works; so design your program using the way that makes the most sense to you.
• Remember you will need to concatenate one character at a time to build the resulting String.
• After the fourth and fifth for loops, print the following prompts with their associated answers:
• And lastly, as good practice, close your Scanner object at the end of your code in main.

Sample Output

Your program should print 13 lines each with an end of line. This includes the first five, where the user enters the values for the first array, followed by a blank line. User input is shown in blue.

Specifications

• Work on your own, as always.
• The name of the source code file must be exactly P6.java
• Name the file exactly - upper and lower case matters!
• Comments at the top as shown above.
• Assignments should be implemented using Eclipse.
• Assignments should be implemented using Java, version 1.8.
• Make sure your code runs on machines in the CSB 120 lab.
• Turn in through the Checkin tab.
• Read the syllabus for the late policy.
• We will be checking programs for plagiarism, so please don't copy from anyone else.

Grading Criteria

• testCompile: checks that program compiles. (0 points)
• testMenu: verify correct menu printed (12 points)

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• 5.1: Introduction to Linear Algebra
• 5.2: Advanced Topics in Linear Algebra

 Subtopics — Notes/ Examples:

• Smoothing of data. Linear Regression

 Tasks:

• Write a program in C++, which reads a set of test scores through the keyboard, locates and prints the maximum and minimum score.  Your program should also calculate and print a set of adjusted scores that are obtained by multiplying each original score by the same bonus factor so that the average of adjusted scores is 85% ( when you enter grades pretend to be the lean mean grading machine ).

Goldie's AP® Computer Science A Coding Projects for Unit 6: Arrays

Also included in

Description

AP® Computer Science A (AP® CSA)

Coding Projects with Arrays

The material covered in these projects aligns with Unit 6 of the AP® CSA CED. These projects ask students to code in the Java programming language.

All projects come with both the editable WORD document, the PDF version, as well as an answer key. You will have the ability to change directions or edit anything to fit your own classroom needs.

Daycare Statistics Project – Students are taken through the steps to import a data file into their program, put the contents into an array, and then work with the common array algorithms.

Multiplication Facts Practice Project – Students will use arrays to make a program that helps the user practice their multiplication facts.

Sum of Two Dice Simulator Project – Statistics and Computer Science cross over in this program where students will simulate rolling a die a certain number of times and use arrays to store their answers.

***********************************************************************************

Interested in more AP® CSA material? You can find these Unit 6 coding projects in the following resources:

Goldie's AP® Computer Science A UNIT 6 PLANS - Arrays

Goldie's FULL CURRICULUM for AP® Computer Science A

Explore my other Java Coding Projects resources:

Unit 1: Primitive Types Coding Projects

Unit 2: Using Objects Coding Projects

Unit 3: if Statements Coding Projects

Unit 4: Iteration Coding Projects

Unit 5: Writing Classes Coding Projects

Unit 6: Arrays Coding Projects

Unit 7: ArrayLists Coding Projects

Unit 8: 2D Arrays Coding Projects

Unit 9: Inheritance Coding Projects

Unit 10: Recursion Coding Projects

Goldie's AP® Computer Science A Coding Projects Bundle

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Assignment 6: NameSurfer

Due: Tuesday, August 15, 11AM PST

May be done in pairs

Your sixth assignment is a baby name graphing program that will give you practice with data structures, classes and interactors.

Getting Started

There is a starter project including all of these problems that you can access using the link below. Once you have the starter code set up, edit the program files so that the assignment actually does what it’s supposed to do (see the assignment handout), which will involve a cycle of coding, testing, and debugging until everything works. The final step is to submit your assignment.

This assignment may (optionally) be done in pairs. As a reminder, you may only pair up with others with the same section time and location.

Assignment Files

To run the demo, download the zip file below and unzip, and double-click the enclosed JAR file to run. If you are unable to run it by double-clicking, right-click on the demo JAR file and click "Open".

Output Files

If you would like to view them separately, the output image files, which are already included in the starter code in the output folder, are listed below as well. For more example output, please see the demo program, linked above. In the demo, you can go to File->Save and save images of the graph to compare to.

Other Resources

Note: the "Debugging with Karel" handout still provides valuable debugging tips for Java programs! In particular, the debugger functions identically for Karel and Java programs. You can also mouse over variables while the program is paused in the debugger to view their current value (super useful for arrays!)

© Stanford 2017 | Created by Chris Piech and Nick Troccoli. CS 106A has been developed over time by many talented teachers.