concerning your first question, passing pointers is not possible. Few ideas how to transfer array data contents can be found in the section Exchange array contents and in diverse threads in this Ask forum. Concerning the second question, the 'zero' character terminates the strings. If you plan to use a string as data buffer to transfer data, you would need to encode the data so the value zero is omitted.
I hope it helps you further.
1) Encoding the data means what kind encoding to be done. Is it like replacing the zero character with some other?
yes, this is the idea.
2)As per the example in the link, the extern variable is getting declared inside the method in generated .C file. Hence getting error while accessing the variable in C code to assign values.
In the examples an externally defined variable is used:
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