User Tools

Site Tools


Sidebar

projects

wcp1 (due 20240828)
btt0 (due 20240904)
wcp2 (due 20240904)
pct0 (bonus; due 20240905)
pct1 (bonus; due 20240905)
pct2 (due 20240905)
abc0 (due 20240906)
msi0 (due 20240911)
pct3 (bonus; due 20240911)
wcp3 (due 20240911)
msi1 (due 20240918)
pct4 (due 20240918)
wcp4 (due 20240918)
dsr0 (due 20240926)
pct5 (bonus; due 20240926)
wcp5 (due 20240926)
gfo0 (due 20241002)
pct6 (due 20241002)
pnc0 (due 20241002)
wcp6 (due 20241002)
dsr1 (due 20241009)
pct7 (bonus; due 20241009)
wcp7 (due 20241009)
bwp1 (bonus; due 20241016)
pct8 (due 20241016)
pnc1 (due 20241016)
wcp8 (due 20241016)
pct9 (bonus; due 20241023)
pnc2 (due 20241023)
wcp9 (due 20241023)
gfo1 (due 20241030)
mag0 (due 20241030)
pctA (due 20241030)
wcpA (due 20241030)
mag1 (due 20241106)
pctB (bonus; due 20241106)
wcpB (due 20241106)
mag2 (due 20241113)
pctC (due 20241113)
wcpC (due 20241113)
pctD (bonus; due 20241120)
wcpD (bonus; due 20241120)
bwp2 (bonus; due 20241204)
gfo2 (due 20241204)
pctE (bonus; due 20241204)
wcpE (bonus; due 20241204)
EoCE (due 20241216)
haas:fall2024:discrete:projects:pnc0

Corning Community College

CSCS2330 Discrete Structures

PROJECT: Prime Number Computation (PNC0)

OBJECTIVE

Start exploring algorithm/implementation comparison and optimization with respect to various approaches of computing prime numbers.

TASK

Implement program in Vircon32 C, that:

  • performs a brute force/“trial-by-division” process on a range of values, 2-N
    • the values for N are some sufficient quantity still small enough to fit within an integer
    • the values for N will have some relationship (powers of 2, powers of 10/magnitudes) that ideally can be computed via some loop/equation (ie 1024, 2048, 4098, 8192, 16384, etc.)

* the upper bound should be fairly easy to change, even if it requires an edit and recompile.

  • the values for N have some sufficient quantity large enough where its upper set values will take some amount of time to compute (fast enough to have some relatable value, not to exceed 16 seconds)
  • for each value of N:

* display that N/upper bound

  • tally: display the number of primes identified (2-N)
  • display the amount of time taken to do the total computation for that value of N, out to 3 decimal places
  • display each N value and result in an arrangement on the screen that can be clearly identified and read by the viewer
  • timing should go out, as reasonable, to a few decimal places, and should be consistent across all attempts.
  • timing is on the computational process only, not the display of results.
  • create a graph (using some external tool) that plots the performance of the C implementation working on various workloads of this brute force algorithm according to the various N's and the time it took. Share your graph of your results on the class discord and on the project documentation page.
  • a line graph is the suggested best candidate
  • this will not be an interactive program: it starts up, does its thing, outputs it results, then halts.
  • this brute force implementation is meant as our baseline. As such, it should not contain any optimizations or attempted improvements. As we progress through pnc1 and pnc2, this base implementation should be the least efficient. This is important, to allow us to realize the impact of various improvements we will be making in those upcoming projects.

REFERENCE

The following are reference screenshots of what your implementations should approximate.

PNC0

C implementation

EDIT

You will want to go here to edit and fill in the various sections of the document:

PNCX

algorithm: brute force / trial-by-division

variant: naive
START TIMEKEEPING
NUMBER: FROM 2 THROUGH UPPERBOUND:
    ISPRIME <- YES
    FACTOR: FROM 2 THROUGH NUMBER-1:
        SHOULD FACTOR DIVIDE EVENLY INTO NUMBER:
            ISPRIME <- NO
    PROCEED TO NEXT FACTOR
    SHOULD ISPRIME STILL BE YES:
        INCREMENT OUR PRIME TALLY
PROCEED TO NEXT NUMBER
STOP TIMEKEEPING
variant: break on composite (BOC)
variant: odds-only processing
variant: sqrt point
variant: break+odds
variant: break+sqrt
variant: break+odds+sqrt

timing

One way to calculate your runtime is by using the get_frame_counter() Vircon32 function. You will need to first store the start frames (before you tally the prime numbers) and your end frames (after you tally the prime numbers). Subtracting the start frames from the end frames will give you a value that you can use to find your runtime. The get_frame_counter() function obtains the current value of the frame counter (there are 60 frames per second). If you’d prefer, you could use get_time() or get_cycle_counter(). Just remember the runtime will need to be drawn in seconds with three decimal places for milliseconds. Don't forget that you need to restart at 0 after you reach each upper bound!

titles

Vircon32 uses the standard BIOS font with a width and height that may be 10 by 15 or 20…

Your title is:

[type]  upper tally runtime 
======= ===== ===== =======

This can be done by printing every word separately and calculating the correct positions or making each line one string. This can be done like:

print_at( X, Y, "title sequence that is really long" );
print_at( X, Y-10, "===== ======== ==== == ====== ====" );

info

You will need to print the info. This can be done similarly to:

    print type name at an X and Y;
    Add X to itself + some value;
    itoa Value;
    print Value at an X and Y;
    repeat x amount of times;
    Time = SomeTime - OtherTime
    ftoa Value;
    Some string length, manipulation, and copying may be required for printing decimals;

It is suggested that you make this into a function with parameters that you can pass to it. This may be done for cleanliness and ease of use in the future!

Also, two important functions used in the example are the itoa and ftoa functions which are a part of the string.h library. They allow you to convert numbers to strings which will be important for displaying data that you have recorded.

wedge pnc0 runtimes

VerbalGnat48 pnc0 runtimes

MrVengeance pnc0 runtimes

cburling pnc0 runtimes

bpatricelli pnc0 runtimes

amelvil2 pnc0 runtimes

 

SUBMISSION

To be successful in this project, the following criteria (or their equivalent) must be met:

  • Project must be submit on time, by the deadline.
    • Late submissions will lose 33% credit per day, with the submission window closing on the 3rd day following the deadline.
  • Executed programs must display in a manner similar to provided output
    • output formatted, where applicable, must match that of project requirements
  • Processing must be correct based on input given and output requested
  • Output, if applicable, must be correct based on values input
  • Code must be nicely and consistently indented
  • Code must be consistently written, to strive for readability from having a consistent style throughout
  • Code must be commented
    • Any “to be implemented” comments MUST be removed
      • these “to be implemented” comments, if still present at evaluation time, will result in points being deducted.
      • Sufficient comments explaining the point of provided logic MUST be present
  • No global variables (without instructor approval), no goto statements, no calling of main()!
  • Track/version the source code in your lab46 semester repository
  • Submit a copy of your source code to me using the submit tool by the deadline.

Submit Tool Usage

Let's say you have completed work on the project, and are ready to submit, you would do the following:

lab46:~/src/SEMESTER/DESIG/PROJECT$ submit DESIG PROJECT file1 file2 file3 ... fileN

You should get some sort of confirmation indicating successful submission if all went according to plan. If not, check for typos and or locational mismatches.

RUBRIC

I'll be evaluating the project based on the following criteria:

156:pnc0:final tally of results (156/156)
*:pnc0:submitted C implementation and build files, builds cleanly [26/26]
*:pnc0:processing and output is correct, and to specifications [26/26]
*:pnc0:no optimizations or improvements on the process [26/26]
*:pnc0:graph produced from timing data produced [26/26]
*:pnc0:graph posted to discord and documentation page [26/26]
*:pnc0:timing data is the taken out to 3 decimal places [26/26]

Pertaining to the collaborative authoring of project documentation

  • each class member is to participate in the contribution of relevant information and formatting of the documentation
    • minimal member contributions consist of:
      • near the class average edits (a value of at least four productive edits)
      • near the average class content change average (a value of at least 1024 bytes (absolute value of data content change))
      • no zero-sum commits (adding in one commit then later removing in its entirety for the sake of satisfying edit requirements)
    • adding and formatting data in an organized fashion, aiming to create an informative and readable document that anyone in the class can reference
    • content contributions will be factored into a documentation coefficient, a value multiplied against your actual project submission to influence the end result:
      • no contributions, co-efficient is 0.50
      • less than minimum contributions is 0.75
      • met minimum contribution threshold is 1.00

Additionally

  • Solutions not abiding by spirit of project will be subject to a 50% overall deduction
  • Solutions not utilizing descriptive why and how comments will be subject to a 25% overall deduction
  • Solutions not utilizing indentation to promote scope and clarity or otherwise maintaining consistency in code style and presentation will be subject to a 25% overall deduction
  • Solutions not organized and easy to read (assume a terminal at least 90 characters wide, 40 characters tall) are subject to a 25% overall deduction
haas/fall2024/discrete/projects/pnc0.txt · Last modified: 2024/10/06 15:39 by 127.0.0.1