Is there a dataset both matlab and VC++ can use?

Hello, want to program to store a result to file, which dataset can both Matlab and C++ read?

I know Matlab can save it to .mat file but C++ may not be able to read it.

Thanks.

Answer 1

[Walter Roberson]

If you want a true database, there is the Database Toolkit.

But if you are talking about .mat files, then

1. Yes, you can program C++ to read .mat files; but
2. it is usually easier to transfer the data in binary such as by using fwrite()

[C Zeng]

Yes, of course I can program C++ to read mat files but I prefer easier ways. Will look at database toolkit. thanks.

[Walter Roberson]

Note that there is an official interface and libraries for reading .mat files

[C Zeng]

Will check that for C++, thanks.

If I transfer the data to binary using fwrite, how to read it in C++?

[Walter Roberson]

C++ has fread() that takes similar arguments that you can work with.

The main trick you need to watch out for is that MATLAB uses "column major order" but C++ uses "row major order". That is, in MATLAB, the elements that are adjacent in memory are the ones that are in the same column, whereas in C++ the elements that are adjacent in memory are the ones that are in the same row.

[C Zeng]

OK, thanks. Will be careful on it. I do not think it affect me too much. :)

[Walter Roberson]

So if you address A(I,J) in MATLAB, it would be A[J][I] in C

[C Zeng]

Thanks, Walter!