what is the meaning of the int main(int nNumberofArgs, char* pszArgs[])

Question

And also I want to ask
Can we declare variables before int main()?

Answer 1

int args and char argv[] are used for detecting command line arguements

eg.
./a.out first_arg second_arg

here, int args detects, no. of arguements, in our case, its 3 (including ./a.out)

char argv stores the arguement
in our case,
argv[0] = a.out
argv[1] = first_arg
argv[2] = second_arg

and yes
variables can be declare outside/before main function,
they are called global variables