Introduction
C++，2c++，The Story Generator，3part，
，
Requirement
CSCI 1300 Introduction to Computer Programming
Instructors: Knox
Assignment 3
Due Friday, Feb 10, by 12:30 pm
For this assignment, the solution to each problem should be in a separate.cppfile. Createanewprogram
for eachproblemwithinCodeBlocks. Namethefileproblem1.cppforthefirstproblemandproblem2.cppfor
the second one. Once you have your code running on your virtual machine (VM), you must submit ittothe
autograder byzippingallthefilesintoasinglefiletobesubmitted. Youmustalsosubmityourcode(.zip)to
Moodle to get full credit for the assignment.
Important Note Regarding Zipping Your File: Ensure the .zip is a “flat zip.”Thatis,multi-selectthefilesyou
wish to zip together and compress them; do not zip the folder they are contained in - this is called a
hierarchical zip and COG will not be capable of locating your files.
Submitting Your Code to the Autograder:
Before you submit your code to COG, make sure it runs on your computer. If it doesn’t run on the VM, it
won’t run on COG.
The computer science autograder, known as COG, can be found here:
● Login to COG using your identikey and password.
● Select Assignment 3 from the dropdown.
● Upload your .zip file and click Submit.
Your files within the .zip must be named problem1.cpp and problem2.cpp forthegradingscripttorun.COG
will run its tests and display the results in the window below the Submit button. If your code doesn’t run
correctly on COG, read the error messages carefully, correct the mistakes in your code, and upload a new
file. You can modify your code and resubmit as many times as you need to, up until the assignment due
date.
You must submit your code on COG and Moodle.
For this assignment you must schedule an interview grading
appointment with your TA after you submit your code.
We’ll talk more about scheduling the interview in
lecture and recitation.
The grade distribution for this assignment is 60% grade from cog and 40% from interview grading.
Submitting Your Code to Moodle:
You must submit your code to Moodle to get full credit for the assignment, even if the computer science
autograder gives you a perfect score.
Please also include comments in your code submission to describe what your code is doing. Comments at
the header of your files should include your name, recitation TA, and the assignment and problem
number. TAs will be checking that you code has comments.
Problem Set
For each of the following problems, create a program to solve the problem. Divide the program into
separate, but cooperating, functions. Do not write the complete programasonebig``chunk’’ofstatements
in main().
Problem 1: The Story Generator
In the game Mad-libs, players are asked for parts of speech, suchanoun,adjective,oradverb,andthose
words are plugged into a template sentence to generate a sometimes- funny story.
For this problem, write a function named “madLibs”thatplaysasimplegameofMad-libs. Yourprogram
needs to store the story template in a string variable and ask the user for parts of speech to fill in the
template. Use the following template:
“In the book War of the , the main character is an anonymous who
records the arrival of the s in – Needless to say, havoc reigns as the s
continue to everything in sight, until they are killed by the common .”
When the programmer starts, you should first ask the user if they want to play a game. Your question
should look like:
“Do you want to play a game? (y) or (n)”
The user types y
if they want to play and n
if theydon’t.Iftheuseranswersy
,thenyourprogramshould
ask for entries for each of the missing word types in your template, such as:
“Enter a plural noun: ”
“Enter a singular noun: “
“Enter an occupation: ”
“Enter an animal name: ”
“Enter a place: ”
“Enter a verb: ”
Build a new string variable that includes theuserentriesinplaceoftheword-typeplaceholdersandprint
the variable to show the user the new sentence.
If the user types “n” whenaskediftheywanttoplay,yourprogramshouldprint“goodbye”andexit.The
user should be allowed to play the game as many times as they like. After printing the new sentence,
your program should ask if they would like to play again, and if they answer y
, your program should
repeat the game, beginning at the spot where you ask the user to enter word types.
IMPORTANT NOTE: User-input to playfurthermustbeobtainedinsidethemainfunction,notwithinyour
user-defined function. That is, the loop that enables the game to be played indefinitely must not be
within your user-defined function - COG will not accept it.
CSCI 1300 - Assignment 3 Due Friday, Feb 10, by 12:30 pm
Problem 2: Solar Energy
Solar Energy(measured in KWh) generated by a solar panel or array of panels depends on its area,
efficiency, solar radiation of the location and performance ratio.
Equations to calculate solar energy output is shown here:
where E
is the average energy generated annually by the solar array in kilowatt-hours (kWh).
There are several other noteworthy parameters in these equations:
A is area of the solar array in meter square
r is the solar panel efficiency in percentage
H is the average solar radiation in kWh/m2
/year
PR is the performance ratio (coefficient of loss)
- usually between 0.5 and 0.9, with a default of 0.75
Part A
Write a function “energyCalculator” to calculate average energy output. Your main function shouldtake
in user inputs for A,r,andH,itshoulddeclareaconstantvalueforPR
,passthesevaluesasparametersto
your function. After yourfunctioncalculatestheaverageenergy,itmustreturnthisvaluetomain.Totest
your code, if you use A = 20, r = 0.15 , H= 1250 as inputs and assume PR= 0.75
, you should get 2812.5
KWh
.
Within your main function, print the following cout statement:
cout << “The average annual solar energy production is ” << average_energy << ”kWh.” << endl;
Part B
Once you have the average energy output calculation working, create another function “printEnergy”
that prints all the peak energy valuesforefficiency(r)from0.10to0.35by0.05step.Thefunctionshould
receive A, r, H,andPRasinputparameters;youmayutilizethesameuserinputforAandHasreceivedin
Part A
above.
Use the following cout statement to output the values from within
the function:
cout << “The average annual solar energy for an efficiency of “ << efficiency_value
<< “ is “ << annual_energy_ave << “ kWh.” << endl;
IMPORTANT NOTE: The loop that enables the iteration over different efficiency values must not be within
your user-defined function - COG will not accept it.
CSCI 1300 - Assignment 3 Due Friday, Feb 10, by 12:30 pm
Part C
Solar panel arrays can be installed on each house to support that individual household, or we can build
solar farms with much larger solararraystosupportcommunities.Getuserinputfortheaveragenumber
of kWh used by an average household and calculate the number of households the specified solar array
can support for a year. (Note: average usage in Colorado is ~8500 KWh per year)
Create a function “calculateNumberHousesSupported” that takes parameters of averageenergyofsolar
array and energy required by one household and returns the number of houses it will support. The
function call from the main function of yourprogramshouldusetheaverageenergyoutputascalculated
in part a above and the user supplied average energy usage to calculate a floating point value.
Use the following cout statement to output the value in main function:
cout << number_houses_supported << “ houses can be supported.“ << endl;
Note
: The COG grading script. will test with different inputs for the same Mad LIb template. Once you have
yourcoderunningonCOG,youarewelcometoexploreotherapproachestogeneratingthetemplate,suchas
reading it in from a file, or having multiple templates that can be selected randomly. Doing so will make it
possible to build a much more complex, and interesting, game.
Note: Redundant code is discouraged.
See the DRY (Do not Repeat Yourself) coding principle:
Points to remember when running your code in COG:
These are some things in which COG is very rigid:
1. Students must include void for the input parameter of functions that don’t take input, rather
than leaving it blank.
For example,
correct int some_function (void) {}
incorrect int some_function () {}
2. Whenever you are prompting the user for input from within a user-defined function, they must
end the prompt with a colon (:).
For example,
// Inside some_function()
correct cout << “Please enter a value for x: “;
incorrect cout << “Please enter a value for x “;
CSCI 1300 - Assignment 3 Due Friday, Feb 10, by 12:30 pm
3. Answers printed from within a user-defined function must end with a period.
// Inside some_function()
correct cout << “The answer is 42.”;
incorrect cout << “The answer is 42!”;
incorrect cout << “The answer is 42”;
4. In addition to #3, answers printed from within the user-defined function must exactly follow the
cout string template given in the writeup.
CSCI 1300 - Assignment 3 Due Friday, Feb 10, by 12:30 pm