[gmx-users] Length of .xtc file in frames for C-Code

[GtrAngus]

Hi :)

I have a question to all the people who are familiar with C-code. How can I
read in the total number of frames in my *.xtc file? Especially when I do
the analysis somewhere in the middle?

E.g: I have a file with 100.000 frames. When I start the programm with

./program -f traj.xtc 

then I want somewhere in my code something like:

int totalnumerbofframesyouareanalyzing = 100.000


When I do the same with:

./program -f traj.xtc -b 20.000

then I want in my code:

int totalnumerbofframesyouareanalyzing = 80.000

Thanks for your help!
GtrAngus

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