Category archives: Cs50 solutions

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Feel free to browse the code in this repository after you do your best to solve the assignments yourself. CS50 - Harvard University - edX. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. Branch: master. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again.

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Reload to refresh your session. You signed out in another tab or window. CS50x Coding Contest Practice. Edit challenges. Dec 27, Final Project Video. Dec 26, Initial commit.

Oct 5, Finish problem set 5. Oct 29, Finish problem set 6. Nov 9, Finish problem set 7. Nov 19, An entry-level course taught by David J.

c programming video tutorial - pattern printing 2

Topics include abstraction, algorithms, data structures, encapsulation, resource management, security, software engineering, and web development. Problem sets inspired by real-world domains of biology, cryptography, finance, forensics, and gaming.

CS Introduction to Computer Science. An introduction to the intellectual enterprises of computer science and the art of programming. Take course on. Open January 1, — December 31, Time commitment. Topic s. What you'll learn A broad and robust understanding of computer science and programming How to think algorithmically and solve programming problems efficiently Concepts like abstraction, algorithms, data structures, encapsulation, resource management, security, software engineering, and web development Familiarity in a number of languages, including C, PHP, and JavaScript plus SQL, CSS, and HTML How to engage with a vibrant community of like-minded learners from all levels of experience How to develop and present a final programming project to your peers.

David J. Rob Bowden. Zamyla Chan. Chemistry and Chemical Biology doctoral candidate Harvard University.

cs50 solutions

Doug Lloyd. Associated Schools. Enroll now. You may also like. Computer Science. CS50 for Lawyers. This course is a variant of Harvard University's introduction to computer science, CS50, designed especially for lawyers and lawBy using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

It only takes a minute to sign up. I've coded this problem set and it works completely fine on my machine printing all desired output. However, in gradebook it says it did not get the required output for given inputs.

I'm on windows machine. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered.

Asked 4 years, 9 months ago. Active 3 years, 4 months ago. Viewed 12k times.


Ashish Patel Ashish Patel 50 1 1 gold badge 1 1 silver badge 6 6 bronze badges. Active Oldest Votes. ChrisG ChrisG 7, 2 2 gold badges 12 12 silver badges 25 25 bronze badges. Ah so I lost all my grades for this tiny mistake?

Thanks a lot, Chris. Mark the answer as correct if it helped you. Also you didn't lose your grades. You just have to resubmit the corrected code and you will get the full grade! Could you help me out in understanding this? Thank you! By calling round on that float we "round" it to its closest integer for example 3. But the return value of round is still a float, so we cast it to an int using int in front of the call to round.Introduction to the intellectual enterprises of computer science and to the art of programming.

Students learn how to think algorithmically and solve problems efficiently. Topics include abstraction, algorithms, data structures, encapsulation, resource management, security, software engineering, web development, and artificial intelligence. Problem sets inspired by real-world domains of biology, cryptography, finance, forensics, and gaming.

Students are expected to attend both lectures unless you have a time conflict. If you are unable to attend these lectures, you will be able to watch the recordings on the course web site. All subsequent lectures will be recorded at Harvard on Monday morning; you may watch the live stream on this web site or the recording later in the day.

While most sections will be held throughout the day on Tuesday, we will hold a few sections Monday nights and Wednesday mornings. We will provide instructions for sign-up sections once the semester starts you will not sign up through the registrar. Along the way will students learn to. Ultimately, the course provides students with a foundation for further studies in computer science and empowers students to apply computer science to problems in other domains.

Note it will only satisfy the QR requirement if you take it for a grade. Please also remember that your course grade will reflect how much you progress over the semester. We expect you to work hard and learn a lot, and your course grades will reflect that. Course grades tend to be quite high in CS Multiple missing problem sets, a missing quiz or final project, and violations of the academic honesty policy may each result in a reduced or failing grade.

Auditors are welcome in CS Graduate students, employees, and their family members who formally register as auditors may also participate in all aspects of the class including section, office hours, and receiving graded feedback on your problem sets. We do not require or expect you to complete all the coursework like a regular student, and we will not worry if you choose not to.

However, we will not be able to help you individually catch up or grade late submissions if you have not been fully participating in the class. However, what ultimately matters in this course is not so much where you end up relative to your classmates but where you end up relative to yourself at the start.

Remarkable effort and upward trending are considered, as is input from the teaching fellows. The course does not have pre-determined cutoffs for final grades. The course is not graded on a curve. No books are required or recommended for this course. However, you might find the below books of interest. Warren Jr. Lectures are supplemented by weekly sections led by the teaching assistants.

Different sections are offered for less-comfortable and more-comfortable students. We will provide instructions early in the semester for section sign-up; you will not sign up through the registrar or preference selection because we need to account for the different comfort levels and for graduate students who do not have access to preference selection.

These dates and times will appear on the aforementioned schedule. Problem sets are typically assigned weekly until Thanksgiving break. After Thanksgiving you will be working on your final project.When you first start the mobile app and connect to your device, you will be given the option to personalize or select from 3 presets.

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cs50 solutions

Repairs and Returns. Contact Us.Thanks for this Peter. This is much simpler :. Thanks for the solution. Line 33,34 Thank you! Veselka, it is used to find out the length or number of digits of the credit card. The length of the credit card will be stored within the count variable. Veselka, by dividing the credit card number in base 10 repeatedly by 10, it is effectively shifting off the rightmost digit, incrementing the count and then repeating.

When the last digit is shifted, the value becomes 0 and we have the final digit count. I wrote a solution today that used some different methods to do the checksum, but I didn't like the way I did the final validation.

This solution is better. Can any body explain me, what is happening in the 5th, 6th and 8th line of below code copied from above.

I did it differently but your solution is way more elegant. My problem was that I didn't know how to make the program recognize the position of a diigit in the number and had to find a workaround.

Your "number[i]" looks like what I was looking for. Could you explain to me how you that works? Specifically, it's a duplicate of number[] with the exception of never defining the character in the 0 position.

Why is that? If the only thing originalnumber[] is needed for later is to check at most the last two digits first two of cardnumberwhy not only assign those last two digits from number[]? Hey, you have multiplied all alternate numbers by 2 but you have not added them and also haven't done the next step of adding the other alternate numbers.

Can someone please explain to me very briefly specifically how the Checksum section works? Would really appreciate that. Wouldn't that give you one less number in the originalnumber variable?

Basically this counts the number of digits in card number. Digits being divided by 10 unless digits become less than 0 i. Hence is having 4 nos of digits count. Skip to content. Instantly share code, notes, and snippets. Code Revisions 1 Stars 8 Forks 5. Embed What would you like to do? Embed Embed this gist in your website.

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cs50 solutions

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Please help me create the pyramid with height "n" print correctly using hashes and spaces that is right-aligned. I have posted the code itself below. The program correctly asks for the user input, but doesn't build the pyramid right-aligned. If anyone can fix this, please help. So each time it loops round it's correctly drawing the hashes and a new line but your not telling it to draw any more than 1 space each time as unlike the subloop for the hashes the instruction doesn't increase with each pass.

Here is how I solved the version of this problem with both sides, but you can make it work with only one, just use 2 for-loops instead of three. If we have to take a number 1 — 8 as an input which is the height of our pyramid, we can use one for loop to print out each row of the pyramid. And since we need the other side of the pyramid as well, we will use three loops in total within our main loop. Why three loops and not four? Beside the height variable we need another one that will work as a counter, since we cannot manipulate our height variable.

These for loops work in opposite direction, i. I actually made a blog post about this since I like to keep notes in case that you need more information.

Learn more. How to make the pyramid CS50 Mario Program formed by this code to be right aligned? Ask Question. Asked 4 years, 7 months ago. Active 1 month ago. Viewed 44k times. Jonathan Leffler k gold badges silver badges bronze badges. SKammala SKammala 35 1 1 gold badge 1 1 silver badge 3 3 bronze badges. I wonder what happens when you search the site for C questions containing "pyramid" Active Oldest Votes. Philip Burgess Philip Burgess 11 1 1 bronze badge. Palaniichuk Dmytro Palaniichuk Dmytro 1, 2 2 gold badges 20 20 silver badges 41 41 bronze badges.

Welcome to Stack Overflow! Michael Elimu Michael Elimu 35 4 4 bronze badges. Vladimir Vladimir 1. Amoury Amoury 31 5 5 bronze badges.

Inside this loop, we will need another two for loops that print spaces and hashes.

cs50 solutions

Goran Spasojevic Goran Spasojevic 1 3 3 bronze badges. This is how I got it to work for mario more comfortable. Adrian Mole

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