Update klog_main.cpp

[serangelicloud]

updated a couple of lines of code for compability problems

here i solved a error you could encounter on some windows computers:

identifier \"strcpy_s\" is undefined identifier \"localtime_s\" is undefined

This is meant only for the ones who don't have the c standard library, but this code is compiled in C++ so not everyone has it.

please review

[GiacomoLaw]

Thanks :D