Programming assignment #4: grada | Computer Science homework help




This program processes user input using a


. You should handle the following two special cases of input:

A student can

receive extra credit on an

individual assignment

, but

the total points for homework are capped at the



. For example,

a student












0, and





0 on three assignments

, and











homework points (the max) even though they earned




Sections points ar

e capped at



Cap exam scores at 100.

If the raw or shifted exam score exceeds 100, a score of 100 is used.

Otherwise, you may assume the user enters

valid input

. When prompted for a value, the user will enter an integ

er in the

proper range. The user will enter a number of homework assignments

1, and the sum of the three weights will be exactly

100. The weight of each category will be a non

negative number. Exam shifts will be


Development Strategy and Hints:


ackle parts of the program (midterm, homework, final exam) one at a time, rather than writing the entire program at

once. Write a bit of code, get it to compile, and test what you have so far. If you try to write large amounts of code

without attempting

to compile it, you may encounter a large list of compiler errors and/or bugs.

To compute homework scores, you will need to cumulatively sum not only the total points the student has earned, but

also the total points possible on all homework assignments. S

ee textbook section 4.2 about cumulative sums.

The homework part reads two values on one line from the


. See the lecture slides for an example of this.

Many students get “cannot find symbol” compiler errors. Common mistakes include forgetting to p

ass / return a

needed value, forgetting to store a returned value into a variable, and referring to a variable by the wrong name.

All weighted scores and grades are printed with no more than 1 digit after the decimal point. Achieve this with a

custom meth

od or


. The following code prints variable


rounded to the nearest tenth:

double x = 1.2345;

System.out.printf(“x is around


in size.

n”, x); // 1.2

If you are getting scores of 0 regardless of what data the user types, you may have

a problem with integer division.

See Chapter 2 about types




, type

casting, and how to avoid integer division problems. If you have a

value of type


but need to convert it into an


, use a type

cast such as the following:

double d =


int i = (int) d; // 5





to constrain numbers to within a particular bound.

Style Guidelines:

For this assignment, you are limited to Java features from Ch. 1

4. A major part of this assignment is demonstrating that you


derstand parameters and return values. Use static methods, parameters, and returns for structure and to eliminate

redundancy. For full credit, use

at least 4 non

trivial methods

other than


. For reference, our solution is roughly 110

lines long (66

“substantive”), with 6 methods other than


, though you do not need to match this.

Like on previous assignments, you should not have


statements in your


method. Also,


should be a concise

summary of the overall program; main should make

calls to several of your other methods that implement the majority of the

program’s behavior. Your methods will need to make appropriate use of parameters and return values. Each method should

perform a coherent task and should not do too large a share

of the overall work. Avoid lengthy “chaining” of method calls,

where each method calls the next, no values are returned, and control does not come back to


. (See textbook Chapter 4’s

case study for a discussion of well

designed versus poorly designed


This document describes several numbers that are important to the overall program. For full credit,

you should make at least

one of such numbers into a class constant

so that the constant could be changed and your program would adapt.

When hand

ling numeric data, you are expected to choose appropriately between types




. You will lose points

if you use type


for variables in cases where type


would be more appropriate.

Some of your code will use conditional execution with




statements. Part of your grade will come from using

these statements properly. Review book sections 4.1

4.3 about nested


statements and factoring them.

Give meaningful names to methods and variables, and use proper indentation and

whitespace. Follow Java’s naming standards

as specified in Chapter 1. Localize variables when possible; declare them in the smallest scope needed. Include meaningful

comment headers at the top of your program and at the start of each method. Limit line

lengths to 100 chars.

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