error: use of deleted function ‘std::unordered_map [closed] - c++

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I've been working on some C++ code that a friend has written and I get the following error that I have never seen before when compiling with gcc11.1:
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Generally speaking, what does this error mean? What should I be looking for when this type of error occurs?
I have tried to compile with several versions of gcc, but without much success

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I am using OpenCV and PCL to convert a point cloud into a picture [closed]

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The code has an undeclared identifier error CV IMWRITE PXM BINAR.
I wonder if there is a header file that has not been added or the format is incorrect, and how to solve the problem to make the code run.

my code says segmantation fault when i run it can someone help me? [closed]

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but when I run it it says segmentation fault and apart from that, I don't know if the code is correct.
You have a j++ at line 18 that was almost certainly supposed to be a g++. Also, your x+=g; on line 19 is probably supposed to be an x++. You only want to add one each time.

How to get more than 50 transitions in boost msm? [closed]

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I am using boost msm to implement HSM and I am at the point where the maximum number of transitions possible is 50. I looked at some blog posts and they said that if we create /mpl/vector/vector60.hpp, it should work. I tried and this is the error I get
I am wondering how I am generate these vector60, vector70.hpp .. files or map60, map70.hpp files so that I can get more transitions.

Expected unqualified - ID _config [closed]

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So I'm brand new to c++ and just started the beginner class. The professor has given us the exact prompt to put into the program and I am still receiving an error. I have checked over and over for any small flaws such as spacing or random ";" that a lot of people seem to do, but still no results. Can anyone see anything wrong with what I have down?
Remove asterisk (*) right below "//Purpose of this program ..." and try it again.

Basic example from chaiscript.com throws an exception at runtime [closed]

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I added the include directory of chaiscript to my Projects Additional Dependencies and compiled this example successfully.
If I execute it though, it throws this exception:
Unhandled exception at 0x753D5B68 in CHAISCRIPT_TEST.exe: Microsoft C++ exception: chaiscript::exception::load_module_error at memory location 0x0103F0D8.
After further testing around chaiscript seems to complain about not finding the module chaiscript_stdlib-5.8.0
How do I fix that?
Found the solution. The std_lib module has to be initialized the way the example shows.