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Writing Functions in Assembler Code                                     [TOC]
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We give a minimalistic example on how a function written in assembly code can
be called from a C program:

- The C program calling an external function:

  :import: session18/example/test_factorial.c

- The function written in assembly code

  :import: session18/example/factorial.s

Exercise
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Compile, link an run the code.