How to convert code to flowchart by the cflow and the Graphviz

OS:Ubuntu 16.04

C code finctional relevant blocks to display for flowchart by cflow and Graphviz.

cflow: https://www.gnu.org/software/cflow/

Graphviz: http://www.graphviz.org/

$ sudo apt-get install cflow graphviz

(also need to install python module, how to install python, please chack python site, 

https://www.python.org/downloads/)

To use the below python code, automatically convert your code to png and svg format img. 

https://github.com/calio/cflow2dot

but first of all, might be modified the cflow and dot pass sections in cflow2dot.py

cflow_path = "/usr/local/bin/cflow"

dot_path = "/usr/local/bin/dot"

to

cflow_path = "/usr/bin/cflow"

dot_path = "/usr/bin/dot"

"dot" is one of the apps in Graphviz.

How to check the above command pass, might be useful the following command,

$ which cflow
$ which dot

Finally, execute the python code.

$ "pass to cflow2dot.py folder"/cflow2dot.py  "your code"