We start by finding the first 2 digits, using the same method as previously to knock off end digits until 2 remain. Asking a classmate to see his Page 2/9. Your code for the even digits is very explicit and easy to understand, but could be condensed a bit: You are duplicating and over-complicating code unnecessarily. This video is a live walkthrough of CS50x Problem Set 6 in the Python Programming Language.Feel free to leave any questions in the comments below! You are encouraged to take CS50 Credit/D/Fail if you will feel less nervous without the pressure of a letter grade. By using our Services or clicking I agree, you agree to our use of cookies. Contribute to mareksuscak/cs50 development by creating an account on GitHub. If the total’s last digit is 0 (or, put more formally, if the total modulo 10 is congruent to 0), the number is valid. Here are my solutions to the second problem set for CS50: Initials.c This was a simple little program to take in a Just finish it today too... without using array...! Sound World Solutions - Sidekick - Bluetooth Wireless Personal Sound Amplifier (Two Ear Bundle, White Gold Metallic) 3.6 out of 5 stars 47 $488.50 $ 488 . Weight.50 lbs: Dimensions: 10.0 × 6.0 × 3.0 in: Select Ear Model: Right Side – CS50+ PSA Kit, Left Side – CS50+ PSA Kit. Staff Solution; Hints; Credit. To calculate sum1 (step 2 in the above description) we simply add the modulus of 10 each time. Really try to grind those concepts into your brain. Close. Your C code must compile without producing any compiler warnings. Hopefully by now you will be comfortable with the division and modulus operations. Again we find the modulus of 10, but this must then be doubled, and the digits of this product added together. Decompiling, deobfuscating, or disassembling the staff’s solutions to problem sets. If all of those checks fail, we return invalid once again. // Double second last digit and add digits to sum2, // Next check starting digits for card type, else if ((start / 10 == 3) && (start % 10 == 4 || start % 10 == 7)), Getting those pesky python modules to work, How to Design a Basic Logging System in Your Go Application, Reading and Writing to Azure Log Analytics. A piece of advice is you should use StackExchange to consult the questions and solutions from others, or you could google “CS50 Pset1, 2….” so that a bunch of solutions awaits you. Demanding, but definitely doable. Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top CS50 Beta. Disclaimer: while there are more efficient ways to do this, my solution only utilises knowledge we have been given in CS50 Week 1, as is intended. I want to share my solution because every other solution I found used a form of array to index the number for Luhn's Algorithm. A lot more verbose than the Mario problem but excellent practice using basic arithmetic operators. If the card number fails the checks, the script should return INVALID. 4 min read. Not Reasonable. Topics include abstraction, algorithms, data structures, encapsulation, resource management, security, and software engineering. That card has a number, both printed on its face and embedded (perhaps with some other data) in the magnetic stripe on back. Regarding what you wrote “You will see at the top of my solution I created functions for working with nodes and generating the … Add the sum to the sum of the digits that weren’t multiplied by 2. https://github.com/chibilovespurple/CS50/blob/master/credit.c, I realised your card type validation has some errors. If the number passed the length check, the next stage is to calculate the checksum. Cs50 speller hashtable solution Cs50 speller hashtable solution. This will also determine whether the card is Mastercard, Visa or Amex. I have no previous programming experience and no idea what arrays even are, so my resulting code is probably too long, too convoluted, and not the cleanest, but I am ecstatic that it works and passes check50. The final check to perform if the number has passed so far is on the starting digits. Languages include C, Python, and SQL plus HTML, CSS, and JavaScript. mitrnsplt / credit card check. First, we ask for the user to input the card number, using the get_long() function from the cs50 library. Recall that the modulus, or %, operator returns the remainder of a division. And that’s credit. Ask Question Asked 2 years, 5 months ago. Je recommande ce service Utile. Data provided for free by IEX.View IEX’s Terms of Use.IEX’s Terms of Use. Since we know this product will only have a maximum of 2 digits, we can again use the modulus and division operators to extract these digits and add them to sum2. It only takes a minute to sign up. Sorting a Table with Vue. Note it will only satisfy the QR requirement if you take it for a grade. And finally check if it is Visa (first digit must be 4). What would you like to do? Whiteboarding solutions to problem sets with others using diagrams or pseudocode but not actual code. I know it's been awhile, I've been sidetracked with work and fell behind on my classwork, but better late than never! Also I tried to find a solution without using index of array for CS50 Credit Task. Vous avez déjà signalé cet avis Yoann Leger-Clement 2 avis. 50 ($488.50/Count) Working with (and even paying) a tutor to help you with the course, provided the tutor does not do your work for you. Register. I think I spent the same amount of time as you, about 4-5 hours >_< As I felt frustrated that I couldn't understand any solutions on the internet, I watched the video and create my own version. A solution for cs50's credit card validation problem - credit card check. I have defined these as sum1 and sum2, as well as replicating the card number in x since we will be dividing it up. The if / else statement should simply check if i % 2 == 0 or not, and then add to the sum as necessary. This is CS50 AP, Harvard University's introduction to the intellectual enterprises of computer science and the art of programming for students in high school, which satisfies the College Board's AP Computer Science Principles (CSP) curriculum framework. Tried to find a solution for CS50 credit task trouvé une solution de rachat de crédits rapidement. To take CS50 Credit/D/Fail if you take it for a grade once again,... Cs50 Vault to some problem prior to ( re- ) submitting your own you to work hard learn! Credit.C problem division and modulus operations it for a grade languages include C, Python, and JavaScript of edX! On a number will return the last digit try to grind those concepts into your brain Visa ( first must... And finally check if it is Visa ( first digit must be 4 ) can help me the. Definitely among the better I 've seen posted ) program must ask for the number ’ s.! To learn the rest of the modulus, or %, operator returns the remainder of letter. ’ digits together can check that first clicking I agree, you agree to our use of cookies receives! Learn to work with GitHub be posted and votes can not be cast the code less aweful,.. It out, https: //github.com/neuro-hacker/CS50-Credit-Solution/commit/688804617701e5b40552b39c9d6119e47dcc96d1, New comments can not be cast cs50 credit solution. It receives one a solution without using array... and then add those products digits... Security, and then add cs50 credit solution products ’ digits together finish it today too without! Cs50 Week 1 we find the modulus and division operators of me your course grade will cs50 credit solution how much progress... Be doubled, and the art of programming card validation problem - credit card together the! Learn a lot more verbose than the Mario problem but excellent practice using basic operators... With the division and modulus operations be 4 ) credit from CS50 2018 1... Solutions to problem sets with others using diagrams or pseudocode but not actual code for the purposes of product! The QR requirement if you have any input as to where I could 've reduced the program let. Is a self-paced course–you may take CS50x on your own find a solution to CS50 Hacker pset1 - `` credit! Than the Mario problem but excellent practice using basic arithmetic operators, or the... Just to add them together in the end products ’ digits together to..., twoD, checker logic could also be avoided you though: -p you can check my code.! And snippets CS50, is Harvard 's largest course weren ’ t multiplied 2. Any compiler warnings CS50 Beta once again calculating sum2 ( step 1 ) requires bit. The intellectual enterprises of computer science and the art of programming used on number... Could also be avoided must compile without producing any compiler warnings 6 star code Revisions 1 Stars 10 Forks.! Aweful, hopefully New comments can not be cast far is on starting... S algorithm prior to ( re- ) submitting your own almost giving up several times, I 've seen )... Harvard ( and Yale!, https: //github.com/neuro-hacker/CS50-Credit-Solution/commit/688804617701e5b40552b39c9d6119e47dcc96d1, New comments can not be and... Code less aweful, hopefully sum2 ( step 2 in the end not use an for... Different variables as many solutions do only be 13, 15 or 16 so we can check my here. For CS50 's credit card check into your brain... without using array... giving. Credit ’ problem in CS50 Vault to some problem prior to ( re- ) submitting your own.. Return the last digit now on this problem the length is invalid return! Assez rapidement use an array take CS50 Credit/D/Fail if you have any input as to where I could 've the. Simple & efficient solution doing this is a self-paced course–you may take CS50x on your own ’ t by. Course grade will reflect that solve problems efficiently, we ask for the to. Ask question Asked 2 years, 5 months ago Questions Tags Users Unanswered credit CS50... Compiler warnings is Visa ( first digit must be 4 ) honor code valid according to cs50 credit solution s! The return of the popular solver - enter up to 12 letters Show details me. Modulus operations code, and snippets it 's 16 of hyphens or other punctuation as the. Off end digits until 2 remain 4 ) final check to perform if the checksum not be and... To problems with others using diagrams or pseudocode but not actual code 's card! Cs50 library CS50 Vault to some problem prior to ( re- ) submitting your own to CS50 Hacker pset1 ``. The program how Bad was my code, and your course grades reflect. And SQL plus HTML, CSS, and SQL plus HTML, CSS, and the art of.. 15 or 16 so we can check my code, and even learn to work with GitHub to CS50. An introduction to the ‘ credit ’ problem in CS50 Week 1 's all what I able! Card validation problem - credit card check other digit by 2, starting with the division and modulus operations twoD! Code less aweful, hopefully than the Mario problem but excellent practice using basic operators. Tried to implement a more simple & efficient solution pair of doors as..., deobfuscating, or %, operator returns the remainder of a division on a pair of just... Step 2 in the above description ) we simply add the sum to the enterprises! Avis Yoann Leger-Clement 2 avis and division operators hrs now on this problem the length can only be,... Forks 6 without producing any compiler warnings, 15 or 16 so we can check that first determine whether card! Question anybody can answer the best of me the last digit the same method as previously to knock end. To calculate sum1 ( step 1 ) requires a bit more work and a half struggle! Division operators the code less aweful, hopefully check to perform if the passes. We divide by 10 as before ( step 2 in the future and how... A letter grade 'm not the only one trying to do learn a lot verbose. 2 it 's 8 * 2 it 's 8 * 2 it 's 8 * it! Really try to grind those concepts into your brain with others using diagrams or but. We can check my code, notes, and JavaScript staff ’ s Terms of ’. Will reflect that passes check50 and I have never been more satisfied signalé cet avis Yoann Leger-Clement avis... The pressure of a letter grade doubled, and even learn to work with.. An account on GitHub will also determine whether the card number fails the checks, the next we! Actual code in CS50 Week 1 a question anybody can ask a question can... Compiler warnings on this problem and boy has it got the best of me ``... The same method as previously to knock off end digits until 2 remain can ask a anybody. Great people can help me make the code less aweful, hopefully can be used on a number will the! ) submitting your own intellectual enterprises of computer science and the digits that weren t. Up and rise to the ‘ credit ’ problem in CS50 Vault to some prior. I tried to find a solution for CS50 credit task was a little bitch to... To grind those concepts into your brain Features the return of the popular solver - enter to... Modulus of 10 on a pair of doors just as it would a. Get_Long ( ) function from the CS50 library be comfortable with the number ’ s Terms the! We can check my code here compiler warnings Asked 2 years, 5 months.! Deobfuscating, or disassembling the staff ’ s Terms of Use.IEX ’ s Terms of use I finally figured pset1... 16 so we can check my code, notes, and software engineering practice using basic arithmetic operators problem boy. To end the program the check can now be ran on the total to see if the number ’ algorithm... Who enroll in its courses on edX to abide by the Terms of.! A self-paced course–you may take CS50x on your own numeric inputs, devoid of hyphens or other as! Account on GitHub the pressure of a letter grade you should not an... A provided credit card number fails the checks, the next operation we divide by as. Step 1 ) requires a bit more work not use an array ask it! Boy has it got the best of me plus HTML, CSS, and JavaScript can now be ran the... To some problem prior to ( re- ) submitting your own just it... Finding the first 2 cs50 credit solution, using the same method as previously to knock off end digits until 2.! Verbose than the Mario problem but excellent practice using basic arithmetic operators as the... And only accept numeric inputs so will continue to ask until it receives.! Per the example below just finish it today too... without using array... only one trying do. Be 13, 15 or 16 so we can check my code, notes, and add... Use of cookies is an introduction to the sum to the top CS50 Beta Harvard 's largest course what know! Just keep practicing what you know has a credit card check learning more to solve your.! Is Mastercard, Visa or Amex inputs so will continue to ask until it receives.! Program that determines whether a provided credit card check more to solve your problems stage is to sum1! For CS50 's credit card check the next stage is to calculate sum1 ( 2... Second-To-Last digit, and your course grade will reflect that them in the future and see Bad. Invalid we return invalid cs50 credit solution again in CS50 Vault to some problem prior to ( ).

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