cpp_is_king
Member
You should post your actual code.
-
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Programming |OT| C is better than C++! No, C++ is better than C
- Thread starter Kikarian
- Start date
You should post your actual code.
MisterLuffy
Member
Can I PM message someone my code instead? It's an homework assignment.
cpp_is_king
Member
Can you make up some code that only has a main function and one extra sample function that has the same signature (return type and argument list) as the one you're trying to call, but doesn't contain anything else? Like:
Code:
void foo(int *array) {
}
int main(int argc, char **argv) {
foo(/* something */);
return 0;
}MisterLuffy
Member
Something like this:
Code:
int main(){
QuickSort q;
q.quicksortAscending(r.getArrayofIntegers(), 0, size-1);
}
int QuickSort::getArrayofIntegers(){
return *arr;
}
int QuickSort::quicksort(int arr, int l, int r){
if(l < r){
int q = partition(arr, l, r);
quicksort(arr, l, q-1);
quicksort(arr, q+1, r);
}
}Treechopper
Member
getArrayOfIntegers is an int return type, but you're returning a pointer. Change the return type to int*. Also, in quicksort you're only accepting an int when you need a pointer to an array of ints.
That specific error message is merely telling you you're giving it a type it wasn't expecting.
MisterLuffy
Member
Okay. I compiled, and did not give me errors. I'm trying to return a sorted array in ascending order. Also, I'm trying to return a sorted array in descending order. I'm not sure what I need to do. It only returned one number instead of the rest of the elements in the array.
wolfmat
Confirmed Asshole
Late 2009 white unibody MacBook... Yosemite is free, but stupid with this computer. Mountain Lion is not free and brinks on being inacceptable with this machine (going by reviews).
Mavericks is free, but also probably beachball territory, and it's only downloadable in the Mac dev center -- I am not a member anymore though.
Pre-2012 land it is.
Treechopper
Member
I know it's a homework assignment, but if you want help you're going to have to post more code. You're calling quicksortAscending(), but you only have a quicksort function for me to see (which is never called). Your quicksort function never returns anything despite being of type int, and you're using raw pointers to sort the function recursively which can be dangerous.
It is frustrating that I cant find any answer to why the "[" character cant be used in Visual Studio Code.
It works fine in every single other program, and the "]" character works in the Code too.
Just not the left one. I am not going to handicap myself over this, so back to Brackets for me until I find some solution online
It works fine in every single other program, and the "]" character works in the Code too.
Just not the left one. I am not going to handicap myself over this, so back to Brackets for me until I find some solution online
cpp_is_king
Member
It is frustrating that I cant find any answer to why the "[" character cant be used in Visual Studio Code.
It works fine in every single other program, and the "]" character works in the Code too.
Just not the left one. I am not going to handicap myself over this, so back to Brackets for me until I find some solution online
You should try asking on StackOverflow. Probably the people responsible for VSC are watching it.
MisterLuffy
Member
I stopped focusing on this homework since my instructor posted another homework due next week and it looks overwhelming.
It is frustrating that I cant find any answer to why the "[" character cant be used in Visual Studio Code.
It works fine in every single other program, and the "]" character works in the Code too.
Just not the left one. I am not going to handicap myself over this, so back to Brackets for me until I find some solution online
Any help? I know it's for full-fat VS but still:
http://stackoverflow.com/questions/9324691/cant-type-certain-square-brackets-in-visual-studio-2010-resharper
http://n3wjack.net/2012/11/02/square-brackets-not-working-in-visual-studio-2010-and-how-to-fix-that/
Grab some energy drinks and knock them both out tonight haha.
But really, if you have specific questions, we're here to help.
The Code version sadly has a totally different, minimalistic keyboard shortcut option, where you cant seem to remove default bindings, only override them. I tried going this route, but to no luck so far.
Did that. Awaiting results
MisterLuffy
Member
Sorry for not mentioning this, but the homework was due last night. I'm fine with what I have so far. Right now the homework that's due next week is what I'm concerned with now. There are two problems. For the first problem, I have to implement my own version of class vector using dynamic arrays. The second one is about linked lists. So yeah, it's going to be...fun...
it's going to be a disaster.
Treechopper
Member
Plus, from what I can infer from the code you pasted it looks like the problem isn't as hard as you think it is. Being as specific as possible will help us work you through the problem.
EDIT: Uncanny response time lol. Sorry to hear that.
cpp_is_king
Member
Get an internship, become active in big name open source projects.
mugurumakensei
Member
Internships, open source projects, and hobby projects. That's all you can do. Use that experience to prove you can get up to speed quickly.
Practical experience doesnt matter all that much considering you'll probably be relearning with each job shift. No company has the same standards, coding style, etc. As well, each problem domain has its own unique twists. Business App Development is different from Game Development. Within Business App Dev, some companies develop extensions to larger products. Other companies develop complete turnkey solutions for a given vertical. Add into that web based business apps vs rich native client business apps. You can see how it quickly becomes pointless to put too much stock into practical experience.
Internship helped me more than anything.
Learn more about databases as well, if your education was like mine then they definitely didn't teach you shit about databases.
MisterLuffy
Member
Code:
size_type capacity( ) const;What's size_type? Is it some kind of data type? What statements allows me to make sure that I return the amount of elements that the vector contains without allocating more storage/memory?
Code:
void shrink_to_fit(
);I'm not sure if this is hard for me to understand or I'm thinking too hard. I got this from this website: https://msdn.microsoft.com/en-us/library/dd647619.aspx
So from my understanding, shrink to fit discards the memory that are not used?
I have no idea where to find listings for internships. Any help here would be very appreciated.
I'm mainly using indeed.com and Monster to find stuff. Indeed has been pretty great with programmer listings, as there's usually at least two new listings a day, but of course, no internships.
size_type is a data type. It's usually a 32-bit unsigned integer or a 64-bit unsigned integer, but it is implementation specific. It's defined as being a data type that is large enough to express the maximum size of the container.
Imagine that you have a vector that has reserved enough memory to store 8 items, and you are storing 8 items in it. Then size() = capacity() = 8.
You call pop_back() twice to remove two elements. Now size() = 6. However, chances are that capacity is still = 8 if the data is still stored in the same region of memory. If you call shrink_to_fit(), it will reduce the capacity to 6 (depending on implementation, this may involve creating a new memory region of size 6, copying the data from the old region, then freeing the old region).
Let me suggest that if you are not sure about how this works, there is a very good chance that you shouldn't be bothering with it. It is really only useful if you are working with very large vectors and you care a lot about memory footprint. Using shrink_to_fit can easily cause worse performance in your application if used haphazardly.
Ask people from your school.
cpp_is_king
Member
My university had a career office (specifically for engineers, in my case) that helped me find my co-op job.
Will do. I actually have a co-op option for my course that I've already applied for, so hopefully I get in and get an almost guaranteed internship by next year. (I should get a response by next month)
Thanks for this. Guess it's time to go Google hunting!
cpp_is_king
Member
BTW, I was slightly wrong. It "supports" it (note the quotation marks). It basically tokenizes your entire file, and when you hit Ctrl+Space, it displays a completion list with every token in your file. Still kind of worthless as far as I'm concerned, but not as bad as I thought initially.
Docker is . . .
Alright, so I just wanted to test a simple Rails app to play with Docker, but I can't quite get things to work.
I already have a Rails app on my host pc, which I want to basically mount on the VM, then run it, and . . . that's it. Very simple.
Following this guide, I did this.
Note that I'm using a pre-built one, from a guide, "fcat/rails-getting-started" and trying to overlay my files onto the "getting_started" directory.
It's not working though.
This file system thing is quite confusing for now. I also tried mounting the VM's rails directory to my host PC, but then I can't override them because of some Unix User permissions. 😥
Alright, so I just wanted to test a simple Rails app to play with Docker, but I can't quite get things to work.
I already have a Rails app on my host pc, which I want to basically mount on the VM, then run it, and . . . that's it. Very simple.
Following this guide, I did this.
Code:
docker run -d -p 5000:3000 --name rails3 -v /c/Users/me/RubymineProjects/RailsSample:/docrails/guides/code/getting_started fcat/rails-getting-startedNote that I'm using a pre-built one, from a guide, "fcat/rails-getting-started" and trying to overlay my files onto the "getting_started" directory.
It's not working though.
This file system thing is quite confusing for now. I also tried mounting the VM's rails directory to my host PC, but then I can't override them because of some Unix User permissions. 😥
You should try taking a look at the job boards/postings of specific companies. For example IBM has a variety of student coop/internship positions
D
Deleted member 30609
Unconfirmed Member
It seems crazy to me that there isn't an IDE that just generates a header file for a given class and updates on the fly.
Maintaining two files that express the same information makes me feel like a cave-man.
Maintaining two files that express the same information makes me feel like a cave-man.
If not go to your school's career service office and ask them to get you started on applying for internships. Try to get it done before the fall semester starts though, nearly all internships recruit during the fall for summer internships. Also, unless the company is in town I'd ask your fellow programmers if they are applying for the same internship so you can car pool there
cpp_is_king
Member
They don't express the same information though. The cpp file doesn't contain any information about base classes, member access specifiers, member variables, virtualness or staticness, default parameter values, whether something is a class or a struct, friend declarations, template definitions, and probably many other things I'm forgetting.
What you're asking for is essentially a different language, it's just not technically feasible for c++
Edit: also pure virtual functions and deleted functions
Hi everyone, I'm having a bit of trouble with C++ and not in the actual coding side.
I've got a decent amount of experience in PHP and Java and mainly use Eclipse as my IDE. I have been slowly learning C++ but want to take the next step and play around with existing projects, the main problem being that I don't know how to get them properly set-up in an IDE. I've been trying to use Eclipes (in Ubuntu) but am happy to change to another one if recommended.
So basically, I've been trying to work out the correct sequence of steps so I can get this project: https://github.com/pyland/pyland , pulled off GitHub so I can start editing/building/debugging it in an IDE but keep getting stuck. I have managed to build it in the terminal using the provided instructions, but have no idea how to translate to IDE settings. Ideally I would for this project and work/commit to that to play around with. I've tried googling but nothing's worked so far and I don't really no where to begin.
I've got a decent amount of experience in PHP and Java and mainly use Eclipse as my IDE. I have been slowly learning C++ but want to take the next step and play around with existing projects, the main problem being that I don't know how to get them properly set-up in an IDE. I've been trying to use Eclipes (in Ubuntu) but am happy to change to another one if recommended.
So basically, I've been trying to work out the correct sequence of steps so I can get this project: https://github.com/pyland/pyland , pulled off GitHub so I can start editing/building/debugging it in an IDE but keep getting stuck. I have managed to build it in the terminal using the provided instructions, but have no idea how to translate to IDE settings. Ideally I would for this project and work/commit to that to play around with. I've tried googling but nothing's worked so far and I don't really no where to begin.
Ok, I'm having some problems here.
I'm using a bitset to represent (sub)sets of numbers (for example {3, 5}, a subset of {2, 3, 4, 5}, would be 1010, which I can turn into 10 and access a matrix at that position), and I need to iterate the possible combinations depending on two numbers. See:
Basically, i is the numbers of bits that are set to 1 in the bitset and j is the bit that can't be 1, and I need to iterate trough them. When there's only one possible "arrangement" of the bitset is easy, but I have no idea how to iterate trough the possibilities when there's more than one. I thought to try shifting, but I can't seem to find a way to skip the bit that can't be changed (For example, if I shift 0011 to the left, I need it to be 1010 instead of 0110, because the third bit can't be one in this case).
I'm using a bitset to represent (sub)sets of numbers (for example {3, 5}, a subset of {2, 3, 4, 5}, would be 1010, which I can turn into 10 and access a matrix at that position), and I need to iterate the possible combinations depending on two numbers. See:
Code:
n = 5, i = 0..4
when i = 0
from j = 1..4, put a number in a matrix[ j ][ 0 ]
when i = 1
from j = 1..4, put a number in a matrix at j and the int representation of the bit set with only 1 bit set to one, excluding the bit at j.
Example:
j = 1, bitset = 0010, 0100 and 1000
j = 2, bitset = 0001, 0100 and 1000
j = 3, bitset = 0001, 0010 and 1000
j = 4, bitset = 0001, 0010 and 0100
when i = 2
from j = 1..4, put a number in a matrix at j and the int representation of the bit set with only 2 bits set to one, excluding the bit at j.
Example:
j = 1, bitset = 0110, 1010 and 1100
j = 2, bitset = 0101, 1001 and 1100
j = 3, bitset = 0011, 1001 and 1010
j = 4, bitset = 0011, 0101 and 0110
and so on... (for every n < 100)Basically, i is the numbers of bits that are set to 1 in the bitset and j is the bit that can't be 1, and I need to iterate trough them. When there's only one possible "arrangement" of the bitset is easy, but I have no idea how to iterate trough the possibilities when there's more than one. I thought to try shifting, but I can't seem to find a way to skip the bit that can't be changed (For example, if I shift 0011 to the left, I need it to be 1010 instead of 0110, because the third bit can't be one in this case).
Treechopper
Member
I've never heard of anyone using Eclipse for C++. In Linux land people mostly use QtCreator for C++ if they use an IDE.
However, after looking at their Github it looks like a standard setup as long as your IDE knows where your Makefile is. All the commands before "make" are just environmental variables so check your IDE settings to configure those and you should be good to go.
cpp_is_king
Member
I have. It's a little uncommon, but I knew a few people who used it at work.
Pegasus Actual
Gold Member
I've used NetBeans on windows to build linux C++ stuff remotely with mixed results. I wouldn't touch Eclipse for anything unless given no other choice. If all this latest Visual Studio linux-focused stuff works out it might make my life easier.
JonathanNemo
Member
It's a wonderful world.
EDIT: Icing on the cake, Microsoft has their own Objective-C runtime. Compiling Objective-C using Visual Studio 2015. Heh. Obj-C part starts at 22:20.
Elfforkusu
Member
In the dark, pre-QtCreator days, Eclipse with the c++ plugin was one of the semi-viable choices for a linux IDE amid a field of rubbish.
IIRC I used code::blocks back then. It crashed all the time, but other than that it was moderately acceptable!
D
Deleted member 30609
Unconfirmed Member
I've calmed down a little after some teething, but there are still some inconsistencies that seem a bit off. For example, it seems you have to include function implementation for templated classes in the header file?
I use KDevelop most of the time for C++. If you don't like Qt Creator for whatever reason, i'd recommend it.
Thank you! Will try Qt Creator out. Didn't know about all this stuff.
Ok, so I have Qt Creator installed, created a new project, cloned from git, inserted the URL, it cloned succesfully.
But then I get the following error:
"Failed to open project in ".../pyland2"."
"Could not find any project files matching (CMakeLists.txt, *.creator, *.pro, *.qbs) in the directory ".../pyland2/src"."
And then I can't see it as a project? Any ideas on what to do?
But then I get the following error:
"Failed to open project in ".../pyland2"."
"Could not find any project files matching (CMakeLists.txt, *.creator, *.pro, *.qbs) in the directory ".../pyland2/src"."
And then I can't see it as a project? Any ideas on what to do?
PetriP-TNT
Member
Sorry for advertising, but I made a project naming extension for Brackets today
It's something I have wanted for a long time so there it is. If you find bugs or have ideas, file a issue or send a PR
https://github.com/petetnt/brackets-name-a-project
It's something I have wanted for a long time so there it is. If you find bugs or have ideas, file a issue or send a PR
https://github.com/petetnt/brackets-name-a-project
Elfforkusu
Member
I remember trying KDevelop back in the day, I didn't like it very much. But it has probably improved!
Pretty entrenched in QtCreator though, I won't switch away unless they really eff something up.
If the project is cmake'd: open the top-level CMakeLists.txt in QtCreator.
If there's just a makefile, you need to do a little more work.
Got it to start building woot! However, a new issue has arisen!
Code:
/usr/include/boost/python/detail/wrap_python.hpp:50: error: pyconfig.h: No such file or directory
# include <pyconfig.h>
Code:
install python-devBut when I did it said it was all up to date, should I try removing and reinstalling it?
Doesn't matter I solved it. It was merely a problem with the environment variables
Hi smart-GAF
I thankfully landed a summer job Which requires me to develop ios applications. I started reading up on objective c and noticed most tutorials are using Xcode on macs. I only have a PC, will I need to invest in a mac to start program in objective C to develop ios applications?
Thanks in advance!
I thankfully landed a summer job Which requires me to develop ios applications. I started reading up on objective c and noticed most tutorials are using Xcode on macs. I only have a PC, will I need to invest in a mac to start program in objective C to develop ios applications?
Thanks in advance!