Read ARP cache from machine

I'm working on a program that read arp cache from machine. I'm using Cocoa. There's a library called libdne开发者_如何学JAVAt (libdnet.sourceforge.net) which has arp reading function. But I don't know how to write a code to use that function. Please help.

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You'll need to know C and apply that knowledge to call the library's functions. See this question for links to C-learning resources.

Objective-C is a superset of C, so you'll be able to integrate the C code to call those functions into your Objective-C methods just fine once you know both languages.