Adding includes to cstdint

[LouieVoit]

Description

To fix #256, I've added include to the C++ cstdint in some files and changed include to stdint.h to cstdint.

In some files, there is a using namespace std hence the std::uint*_t is used but in some files it is not present. So I don't know which one is used but it compiles now. I wanted to solve the issue with as little modifications as possible in the code. But should we add the std namespace everywhere ?

How Has This Been Tested?

ls1 compiles fine with gcc 13.1.1 and clang 15.0.7. I've tried to compile with older versions of gcc and clang and it works as well.

[amartyads]

We should actually remove the using namespace std, it shouldn't be in the production code at all. Ideally we should have std:: everywhere. Could you do that in just the files you're modifying currently, as a first step?

[FG-TUM]

@LouieVoit What's the situation with this PR? Is it already reviewable?

[LouieVoit]

I was about to remove the 'using namespace std' as suggested per @amartyads but then it was done in #260 . Maybe we could merge both PR ?

[FG-TUM]

Your PR as it is now doesn't touch the namespaces. Let's keep things clean and separated and merge this one to master asap.

[amartyads]

But the PR #260 doesn't add std:: in front of the uint_*s, atleast in the files Louis has changed. So it'll break the code unless either Louis or Simon update the uints.

[FG-TUM]

No this will break #260 and not master. Thus, the polite way would be to add std:: in front of all special int types in this PR in the files where the headers are changed.

[LouieVoit]

I've added std:: in front of all special int in the files I've modified in this PR

[LouieVoit]

What is the status of this PR ? Can it be merged now ?