Which apps do I need? And where will I get the resources

If you mean ide then go for any ide, I personally use visual studio

For leaning c++ or c++ with data structures

I need apps for smart phone

and i also have to delete first element after moving it to the back

You want a rotate left operation. But unfortunately bitset doesn't support such operations. If you need it, you will have to either "do a linear scan and move the bits one by one I guess" or "convert the bitset into a string and do the manipulations on the string and convert it back to a bitset". I can't tell you which would be better without any performance testing. But from the code's point of view, the second method would be more easily understood.

Given a K number, determine the smallest power of 2 which is bigger than K.

Anyone please.. just give me a hint

Look at the bits in the number. The smallest power of 2 greater than a number would have a 1 bit at the first 0 bit in the given number and the rest of the bits would all be 0

Sorry i didn't understand 🥲

How can I copy a integer value to another

Did you initialise the variable or is it the result of some function

I can't because it is an array in which I have to store the value.

A quick question: std::vector<int> vec{1,2,3,4,-1,-2,-3}; auto res = std::binary_search(vec.begin() + 4, vec.end(), -1); std::cout << res << "\n"; why the code gives 0

Because the array is not sorted

A quick question: std::vector<int> vec{1,2,3,4,-1,-2,-3}; auto res = std::binary_search(vec.begin() + 4, vec.end(), -1); std::cout << res << "\n"; why the code gives 0

does strlen exlude the null terminator? because in the code i'm reading right now i see a lot of strlen(<str>) + 1, or is it for a different reason?

Evaluate the following expressions i) 2>4 && (7<=8) || !(4); ii) int (3.0)*4/6+6; iii) ('A' % 2) == 0; Can I get the answers and explanation on how you reach those answers.

I soppose {-1, -2, -3} is sorted, so the container must be sorted in increasing order?

What's the inherent problem in developing an interpreter-like for C/C++? We can develop a program maintaining a source code file which is filled in by the interpreter user. Every time the interpreter user presses Enter, the interpreter compiles and runs the source/binary respectively - if there is an output which is not some error due to the possibility the user didn't finish to write his routine.

There is nothing to stop anyone from doing this but it is pointless and will be slow.

guys when I want to create a bunch of folder (that also have subfolders) with std::filesystem::create_directories its some times fail and say The filename or extension is too long. its right, because im trying to create a folder with like 14 subfolder, how can I do it?

Slow - probably. Pointless - why?

This depends on the underlying OS. For example POSIX systems can't work with filenames longer than NAME_MAX characters. So in all probability it is the OS that is failing and C++ runtime library wraps it for you.

Pointless because it is slow. The C++ standard committe has already proposed a REPL (it works differently from what you suggested above and has limited functionality) and it is yet to be approved AFAIK.

Can't you look up the documentation? And yes it does not include the null character

Umm, I installed the command line tools in my Mac using this command arch -x86_64 /bin/bash -c "$(curl -fsSL http://bit.ly/homebrew_techdecode)" and then I did not installed any compilar, but whenever I run a c program in vscode, it shows that it's compiled by a gcc compilar, but I want to use clang and it already is installed idk how but when I used the command clang --version it shows installed and the version. So if now, I want to use clang to compile c program instead of gcc, how do I do it?

i did loop up on cplusplus.com but found no info on that, thank you though!

yes, I know that, Im trying to use it on windows, and as you know the max path in windows is MAX_PATH so what can I do for it? I need to be able to create big paths...

Write your own OS. How do you expect it to work if the underlying OS itself doesn't support it? You could create them layer by layer as an alternative workaround.

this is tested, but still not work https://godbolt.org/z/4ahqd5M1z

What's the idea behind their suggestion?

It is a very limited feature set tool which allows basic things like constexpr and consteval functions and allows you to do some limited prototyping. These are things that the compiler can work with without invoking a linker.

You are using Windows. Windows doesn't allow file lengths more than 260 characters and Windows checks this from the root. So even if you are not going to refer to the sub directories from the root, Windows still doesn't allow creating them. Try limiting your folder names to 2 or 3 characters.

Why is the linkage problematic? If some linkage is required as regards to the inserted code, the interpreter will compile with the required linkage, etc...

Because it is slow and people have never felt the need for such a tool.

I've felt this need actually. Thank you

Propose it to the standards committee with reasons and if there are others like you, then maybe it might become a reality

What's the inherent problem in developing an interpreter-like for C/C++? We can develop a program maintaining a source code file which is filled in by the interpreter user. Every time the interpreter user presses Enter, the interpreter compiles and runs the source/binary respectively - if there is an output which is not some error due to the possibility the user didn't finish to write his routine.

array<char, 5> d = {"sdfd"}; compiled vector<array<char, 5>> s1{{"asdf"}}; not compiled error: no matching function for call to ‘std::vector<std::array<char, 5ul> >::vector(<brace-enclosed initializer list>)’ vector<array<char, 5>> s1{{"asdf"}}; how to fix?

It should compile fine.

I found issue. it compiles only from gcc 11.1(std=c++11 is used everywhere) for older compiler vector<array<char, 5>> s1{array<char,5>{"asdf"}}; works

I found issue. it compiles only from gcc 11.1(std=c++11 is used everywhere) for older compiler vector<array<char, 5>> s1{array<char,5>{"asdf"}}; works

This actually exists and is in widespread usage in the physics community since several years ago, look at root.cern

This actually exists and is in widespread usage in the physics community since several years ago, look at root.cern

This looks great. I wasn't aware of this. Looks like an LLVM interpreter. So should be able to support majority of C++ features

Good evening Please I get this error statement...”the range-based for statement requires a suitable begin function and none was found” in my code This is the code double ScoresTotal(double testScore[], int numTests) { double total=0; int numTests=4; double testScore[numTests]; for(auto score : testScore) { total+=score; } } Anyone to help fix this error? Please🙏🏿

Unfortunately you can't iterate over a C-style array with range-based for. You can either use std::array/std::vector, or wrap your array in std::span (if you use C++20)

How do I know the c++ version I’m using

You provide the version to the compiler when you build the app, othervise it uses its defaults. You can try to find your compiler version and google what is the latest C++ version that it supports and how to set it during compilation.

Unfortunately you can't iterate over a C-style array with range-based for. You can either use std::array/std::vector, or wrap your array in std::span (if you use C++20)

Am new to c++,,can someone help me I sorting this out,,I need to arrange in descending order but it's like I got an error in it I can't solve,,any help

#include<iostream> using namespace std; int main() { int n,i,j; int arr[]={4,7,9,3,5,6}; int temp=0; printf("%d",arr[6]); for( int i=1;i<n;++i){ for ( int j=i+1;j<n;++j){ if(arr[i]<arr[j]) arr[i]=arr[n]; { temp=arr[i]; arr[i]=arr[j]; arr[j]=temp;}}} for( int i=1;i<n;++i){printf("%d",arr[i]);} return 0; }