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# An equilateral triangle is a triangle whose sides are equal. If two equilateral triangles are &quot;glued&quot; together along a common side, this...

An equilateral triangle is a triangle whose sides are equal. If two equilateral triangles are "glued"
together along a common side, this will form a diamond. You are to write a class called
Diamond, using filenames diamond.cpp, that will allow the creation and handling of diamonds
based on the above description, whose sides are integers in the range 1-39.
Details:
1. The single constructor for the Diamond class should have 3 parameters: an integer size
(required), which is the length of a side; a border character (optional, with a default of
'#'); and a fill character (optional, with a default of '*'). If the size provided is less than
1, set the size to 1. If the size provided is greater than 39, set the size to 39. The class will
need to provide internal storage for any member data that must be kept track of.
2. There should be member functions GetSize, Perimeter, and Area, which will return the
size of a side, the perimeter of the diamond, and the area of the diamond, respectively.
The first 2 should return integer results. The Area function should return its result as a
double.
3. There should be member functions Grow and Shrink, which will increase or decrease
(respectively) the size of the Diamond's sides by 1, unless this would cause the size to go
out of bounds (out of the 1-39 range); in the latter case, Grow and Shrink should make no
change to the size.
4. There should be member functions SetBorder and SetFill, which each allow a new
border or fill character (respectively) to be passed in as a parameter. The characters that
should be allowed for the border or fill characters are any characters from the '!' (ascii
33) up through the '~' (ascii 126). If an attempt is made to set the border or fill
characters to anything outisde the allowable range, the function should set the border or
fill back to its original default (the ones listed for the constructor -- the border default is
'#' and the fill default is '*').
5. There should be a member function called Draw that will display a picture of the
Diamond on the screen. You may assume that the cursor is already at the beginning of a
line when the function begins, and you should make sure that you leave the cursor on the
line following the picture afterwards (i.e. print a newline after the last line of the
diamond). Use the border character to draw the border of the diamond, and use the fill
character to draw the internal characters. Separate the characters on a line in the picture
by a single space to make the Diamond look more proportional (so that the halves look
more like equilateral triangles). You may not use formatting functions like setw to draw
the diamond. This must be handled with loops. (You will only print out the newline, -2-
spaces, the border character, and maybe the fill character on any given line).
6. Provide a member function called Summary that displays all information about a diamond:
its size, perimeter, area, and a picture of what it looks like. When displaying the area
(decimal data), always show exactly 2 decimal places. Your output should be in the exact
same format as mine (seen in the linked sample run below)
7. I am providing a sample driver program (called driver.cpp) that uses objects of type
Diamond and illustrates the usage of the member functions at page 3 of this document.
I have also provided the output from the sample execution of my driver.cpp program at
page 4. Your class declaration and definition files must work with my main program, asis (do not change my program to make your code work!). You are encouraged to write
your own driver routines to further test the functionality of your class, as well. Most
questions about the required behavior of the class can be determined by carefully
examining my driver program and the sample execution. Keep in mind, this is just a
sample. Your class must meet the specified requirements listed above in the
specification. (For instance, I haven't tested every illegal fill character in this driver
program -- I've just shown a sample). Your class will be tested with a larger set of calls
than this driver program represents.
8. General Requirements
o No global variables, other than constants!
o All member data of your class must be private
o You will need to use the <iostream> library for output. You may use the
<iomanip> library for formatting your decimal output to two places, if you wish
to use the parameterized stream manipulators, but you may not use setw() or
other output formatting functions for drawing the actual diamond. You may use
the <cmath> library
o When you write source code, it should be readable and well-documented.
o The diamond.cpp file should contain the class declaration and the member
function definitions

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