Questions tagged [2019]
The 2019 tag has no usage guidance.
11
questions
0
votes
1answer
157 views
PSet2 doesn't match with Gradebook
I started the course on the 7th of January of 2020. I've done PSet0 and PSet1 with no problem. Now I'm in the middle of PSet2. I've done Caesar and submitted it. It appears in my Gradebook. Now I've ...
0
votes
1answer
34 views
CS50 Resize(less comfortable) I can't create OUTFILE
I've been working on this pset for quite a few days now, but my program doesn't seem to be compiling. It keeps saying "could not create outfile"(my message). I have no idea what to do. Any help would ...
0
votes
1answer
146 views
CS50 pset3 recover
After running it, I got the error massage "double free or corruption (top) Aborted". And I only got 000.jpg.
Need some advice, thanks.
int main(int argc, char *argv[])
{
//ensure proper usage
...
1
vote
0answers
101 views
0
votes
1answer
27 views
How to Map from 2018 to 2019
It is not clear to me how 2018 problem sets are mapped to 2019 ones. I have successfully completed 2018 problem sets 0 - 3 and two of the three required for problem set 4. Do I complete one of the ...
0
votes
0answers
190 views
Pset8 Finance - Sell - Fails to update user's cash in “users” table, and fails to insert sold shares into “portfolio” table
Big picture: On the sell page of the CS50 Finance, I select the shares symbol I want to sell, and enter the number of shares, and click the Sell button, which redirects me to the homepage, but the ...
0
votes
2answers
1k views
Resize ( more comfortable )
int main int argc, char *argv[])
{
// ensure proper usage
if (argc != 4)
{
fprintf(stderr, "Usage: copy infile outfile\n");
return 1;
}
float f = atof(argv[1]);
if(f<= 0.0 && f>=...
0
votes
1answer
147 views
pset7 survey - for loop to give alerts not working properly, why not?
I can't figure out what's wrong with my for loop, written in Javascript. It isn't functioning as needed.
1- It only sometimes gives the javascript alert message saying "Please make sure you have ...
0
votes
2answers
46 views
How can I have two pset4's ; one from 2018 and one from 2019?
I had completed up to and including pset4 in 2018, and upon resuming in 2019 I was required to resume with the new pset4. How can I have 2 pset4's in the same workspace? For now, I named the 2019 pset ...
0
votes
1answer
192 views
Resize(less) How to store triple into an array?
I have been struggling with resize (less). I can't seem to make sense of how to put the value of triple that is being read into an array (rewrite method)
Any help will be appreciated
// iterate over ...
0
votes
1answer
403 views
Resize (more comfortable) - Code does not pass last 3 check50 test (shrinking by 0.5)
For the 2019 version of Resize (more comfortable), my code is able to pass all but the final three tests:
:( resizes 6x6-pixel BMP to 3x3 correctly when f is 0.5
expected exit code 0, not 1
:( ...
