Cross section calculation in Geant4

Dear Experts , With which sample file can I calculate cross section in Geant4? Or is there an example about it?

for electromagnetic processes: examples TestEm0 and TestEm14
for hadronic processes: examples Hadr00 and Hadr03

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you can also use TestEm13

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Do these examples calculate the total reaction cross section and the total product cross section?
Which sample to use for the total reaction cross-section will cause me to get a closer result?

How complete are the README files for the examples Michel mentioned? Was the online documentation for the examples (Geant4 examples: Geant4 Examples) useful? Is there information you need that should be added to that documentation?

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In each example, look at the end of the file xxxx.out to understand what the example does.
( xxxx.out is the printout of xxxx.in )

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