Multiple files open

Hello,

For a large model I would like to have multiple text files open to write my results during the simulation run. Preferable by using a dll.
I know how to open/close files in a dll. Also multiple files is possible, but only within 1 function. I would like to have some kind of reference to the files, so that I do not have to open and close the files each time.
Is this possible and does anyone know how?

Thanks,
Lolke

You can use the C library's fopen command, which returns a FILE * type. Then you just need to globally define your FILE* variables.

FILE* myglobalfile1;
FILE* myglobalfile2;
double myfileopenfunc()
{
   myglobalfile1 = fopen("C:\\log1.txt", "w");
   myglobalfile2 = fopen("C:\\log2.txt", "w");
}
...

After that you use the c library's file i/o commands, i.e. fwrite, fprintf, fclose. A good reference site is www.cplusplus.com.

Anthony,

I was under the impression that you couldn't have global variables in a DLL?


Steven

Steven,
I think you're confusing Flexsim's "Global Variables" feature with a standard C++ global variable. A dll can have as many C++ global variables as you want to have, which is what was being used in the example code above. In 4.32 it wasn't possible to connect a dll to a Flexsim Global Variable, although it is possible now in 4.5 with a little extra connecting code. This isn't documented, so get back to me if you need to connect to Flexsim's Global Variables.

It seems that there are missing some replies in the forum.
Lars-Olof posted a very usefull piece of example code in this thread...

Everytime I try to post the code again I get an error.
I attach the code in a file until the problem is solved.

L-O

Anthony,

I tried searching the forum but I couldn't find anything. Could you explain a bit more how to use Global Variabels from Flexsim in the DLL?

I have looked at the file userfuncs.h and there it states how to define them but I expect that userfuncs has to be called somewhere. Is that in the DLLmain.cpp on the same location where also the Flexsimfuncs.h is called? We tried this but weren't succesfull.

Steven