2 votes
Accepted

Why do computers count from zero?

you can see the following link https://superuser.com/questions/578292/why-do-computers-count-from-zero
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  • 5,172
2 votes
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PSet4 recover: recovered files start with a wrong sequence

The whole problem is given by the following statement: char fileName[7]; The file name is given by seven characters, but you must bear in mind that it is a string, so we need an additional character ...
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  • 5,172
2 votes
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Pset8 - mashup (2018 or 2017): Downloading distribution code does not include txt files

You only show the instructions from the spec, not what happened when you ran the commands, so this answer is only speculative. First, I followed the directions and it worked as expected. Some ...
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2 votes
Accepted

Enrolled in 2018, upgraded for certificate in 2019, can I still get the CS50x certificate in 2020?

Yes, your progress from 2019 will carry forward to the 2020 course, but you'll need to complete the course using the 2020 materials. We'll publish transition instructions in January (much like the ...
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1 vote
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continue from 2018 to 2019

Have a look at your gradebook. I would expect that you don't have grades for Resize, Recover (both pset3 this year), Homepage (pset5) and the final project. Is that what you are seeing? You will ...
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1 vote
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Confused on where to start after 2018 - 2019 switch

You're right, there are some substantial changes for 2019. A lot of the first half of the course content has been compressed into less time and some has been removed. However, the latter half of the ...
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  • 63.4k
1 vote
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Pset8 - Google Maps API - RefererNotAllowedMapError

Thanks to Dinos comment above i have now resolved this issue. It turns out i was logged into the CS50 IDE under cloud9. When running flask this produced a ulr: "http://ide50-USERNAME.c9users.io:8080/...
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1 vote
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codereview or cs50?

The grading system of cs50x course checks whether your code is correct,properly indented, stylized in a way that it implements every loop,data structure,condition as per the syntax so, what you are ...
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  • 302
1 vote

I don't understand how the collatz(n) recursive function works

Based on the Collatz Conjecture, all values of n will eventually reach the value of 1 and fall into the pattern of 1, 4, 2, 1, 4... continuing forever. Therefore we want to have a base condition to ...
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  • 11
1 vote
Accepted

what does "invalid conversion specifier mean" ?

Look at the placeholders in this line: printf("The product of %i and %i is i%!\n", x , y , z); %i is valid, but i% is a typo. (The compiler is interpreting this as a literal "i" followed by the ...
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