Fluent Essays

To do the lab follow the attachment Lab4I also attached Lab4 presentation to explain the lab lab_4_presentation.pdf lab_assignment_4.pdf Unformatted Attachment Preview CS 110 Lab 4 Constants Constants in Java • Constants are identified with the reserved word final • A variable tagged as final can never change after it has been set • If you try to change the value of a final variable, the compiler will report an error and your program will not compile Example using Constants • All constants must use the keyword final and have a datatype • The name of the constant should be in upper case with underscores between words like: IN_UPPER_CASE Java Formatted Print Statements Format Specifiers • Format specifiers begin with a percent character (\%) and terminate ith a t pe character hich indicates the type of data • \%s string values • \%d integer • \%f floating point Format Specifiers Must Match Arguments • Format specifiers must appear within a string literal • The values to insert in the format specifiers must occur in the order the variables listed after the string occur • Example: • You cannot use a \%d format specifier to output a string value Formatted Print Statements • System.out.printf() must be used to print a formatted string • Printf() does not append a new line to the end of a string • Use \n to print something on a new line using printf() Variable Scope Variable Scope 1/2 • Scope of a variable is the part of the program where the variable is accessible. • A method cannot access a variable from another method Variable Scope 2/2 • Methods cannot access a variable from another method even if the variable names are identical • Variables within a method are local (only accessible within the method) Translating Mathematical Formulas to Java Syntax Calculating Slope of a Line • 𝑠𝑙𝑜𝑝𝑒 • We cannot use a long horizontal bar for division in Java, • we must put () around everything on top of the division and put another set of () around everything on the bottom Pythagorean Theorem • The Pythagorean theorem for right triangles: •𝑎 𝑏 𝑐 • Solve for c •𝑐 𝑎 𝑏 • In Java: • = Math.sqrt() • Everything under the square root symbol must be in () • = Math.pow , 2) Expressing in Java • A operator does not exist in Java. • However, you can break it into two equations where you use + for one equation and you use for the other equation • Example: • a = b c in Java must be broken into two statements: a = b + c and a = b c • Use two variables to store the result this Reference this Reference • When you refer to an instance variable inside a method, it means the instance variable of the implicit parameter. • You can access an implicit parameter with the reserved word this. • The this reference is used to distinguish between instance variables and local or parameter variables of the same name. JavaDoc Documentation Comments Documenting Methods 1/2 • When you implement classes and methods, you should add comments about their behaviors • Documentation comments are placed before the class or method declaration and starts with a /** • Press alt + shift + j to insert a JavaDoc comment. Documenting Methods 2/2 • The javadoc utility copies the first sentence of each comment to a summary table. • The sentence should start with an uppercase letter and end with a period. • It does not have to be a grammatically complete sentence, but it should be meaningful when it is displayed in a summary. CS 110 >> Introduction to Computer Science Summer 2020 Lab Assignment 4 T OPICS Constants This reference Variable scope Translating mathematical formulas to Java Syntax Formatted output using printf method I NSTRUCTIONS Complete each problem by creating a Java program that performs the specified action. The Eclipse IDE is strongly recommended but not required. This assignment will cover the following: creating a main function in Java and using print statements to print text out to the console. For this assignment, you will write a program to calculate the volume and surface area of the Pyramid of Khufu in Egypt and print the calculations to the console. IMPORTANT: Complete the below steps in the order they are given. Completing the steps out of order may complicate the assignment or result in an incorrect result. P ROBLEM 1 1. Create a Java class called Pyramid.java 2. At the top of your .java file add the following documentation comments. Replace the italicized text with the appropriate content. /** @author Your Name CS110 Section 02 Lab Assignment 4 Todays Date * * * * */ 3. Create two private instance variables of type double to store the height and the length of the base of a pyramid using variable names of your choice. 4. Create a constructor for Pyramid.java. The constructor should take two parameters of type double representing the height and length of the base of a pyramid. In the body of the constructor use the parameters to initialize the values of the instance variables created in step 3 using the appropriate parameter. 5. Create a method with the signature public double getVolume(). The purpose of this method is to calculate the volume of the pyramid using the instance variables containing the height and length of rev. May 26 – 1 / 4 6. the base of the pyramid and return the calculation. See Figure 1: Surface Area and Volume of Pyramid for the formula to calculate the volume of a pyramid. Create a method with the signature pubic double getSurfaceArea(). The purpose of this method is to calculate the surface area of the pyramid using the instance variables containing the height and length of the base of the pyramid and return the calculation. See Figure 1: Surface Area and Volume of Pyramid for the formula to calculate the surface area of a pyramid. H I NT : YOU W I L L NE E D T O CAL CUL AT E T HE L E NGT H OF T HE S I D E OF T HE P Y R A M I D I N OR D E R T O C AL CUL AT E T HE S URF AC E ARE A . Figure 1: Surface Area and Volume of Pyramid 7. Create a Java class called PyramidCalculator.java in the same Java project folder as Pyramid.java. 8. At the top of your .java file add the following documentation comments. Replace the italicized text with the appropriate content. /** @author Your Name CS110 Section 02 Lab Assignment 4 Todays Date * * * * */ 9. Create two constants of type double to store the height of length of the base of the Pyramid of Khufu. a. The length of the base of the Pyramid of Khufu is 230.34 meters. b. The length of the height of the Pyramid of Khufu is 146.7 meters. 10. Add a main method to PyramidCalculator.java. In the main method, do the following: a. Create an instance of the Pyramid class named pyramidOfKhufu. b. Use the printf me h d in he ing li e al The a ima e l me f he P amid f Kh f i f ll ed b he l me f he amid calc la e ing he al e ed in he constants containing the height and length of the base of the pyramid followed by the string li e al c bic me e See Figure 2: Example Output for an example. 2/4 CS 110 >> Introduction to Computer Science Summer 2020 Lab Assignment 4 c. Use the printf me h d in he ing li e al The a ima e face a ea f he P amid f Kh f i f ll ed b he face a ea f he amid calc la e ing he values stored in the constants containing the height and length of the base of the pyramid followed by he ing li e al a e me e See Figure 2: Example Output for an example. Figure 2: Example Output S UBMISSION Any questions about the assignment itself or errors you may find in your code can always be addressed towards myself via email or in-person. You will submit a zip file named lab4.zip containing Pyramid.java and PyramidCalculator.java to eCampus when complete. This assignment is due Wednesday, May 27, 2020 by 10:00 PM ET however, it can be submitted earlier if complete. M AKE S URE T O S UBM I T T HE . J AVA F I L E AND NOT T HE . CL AS S F I L E YOU W I L L RE CE I VE NO CRE DI T . T HE .CLASS F I L E W HE N S U B M I T T I NG Y O UR W OR K . IF YOU SUBMIT G RADING R UBRIC This assignment is worth 10 points. It will be graded by your instructor using this rubric: Criteria Excellent Good Fair Poor Unsatisfactory (2 points) (1.5 points) (1 point) (0.5 point) (0 points) Program source file is documented correctly Program source file is not missing any required documentation Program source file is missing one required comment Program source file is missing less than half of the required comments Program source file is missing most of the documentation Program source file contains no documentation Program source file follows coding standards Program follows all coding standards Program follows most coding standards Program follows some coding standards Program follows only a few coding standards Program does not follow any coding standards Program Output Program output meets instructional requirements with no errors Program output meets most instructional requirements with minor errors Program output meets some instructional requirements with moderate errors Program output meets only a few instructional requirements with major errors Program output does not meet any instructional requirements rev. May 26 – 3 / 4 Program execution performs according to assignment specifications Program executes correctly with no syntax or runtime errors Program executes with a minor error (one easily fixed error) Program executes with moderate error (few easily fixed errors) Program executes with major errors (significant revision to fix error) Program does not execute Program is wellorganized and is highly readable Program is stylistically well designed Few inappropriate design choices (i.e. poor variable names, improper indentation) Several inappropriate design choices (i.e. poor variable names, improper indentation) Program is poorly written Program contains no organization S OURCES Great Pyramid of Giza Wikipedia: The Free Encyclopedia. Wikimedia Foundation, Inc. 7 May 2020. Web. 18 May 2020, https://en.wikipedia.org/wiki/Great_Pyramid_of_Giza. 4/4 ... Purchase answer to see full attachment