Question

While I was looking at the library code, I found the below line

int number = config.nodes,i,fanout=numP/2;

I assume config is a pointer to something, but can there be commas in the statement? and make assignment like that?

Answer 1

This declares three variables. It’s the same as:

int number = config.nodes
int i;
int fanout = numP/2;

Please note that commas are handled specially in declarations (and argument lists), C++ also has a “comma operator” which is not being used here.