How to call C from Swift?

Question

Is there a way to call C routines from Swift?

A lot of iOS / Apple libraries are C only and I\'d still like to be able to call those.

For example, I\'d like

Answer 1

Yes, you can of course interact with Apples C libraries. Here is explained how.
Basically, the C types, C pointers, etc are translated into Swift objects, for example a C int in Swift is a CInt.

I've build a tiny example, for another question, which can be used as a little explanation, on how to bridge between C and Swift:

main.swift

import Foundation

var output: CInt = 0
getInput(&output)

println(output)

UserInput.c

#include 

void getInput(int *output) {
    scanf("%i", output);
}

cliinput-Bridging-Header.h

void getInput(int *output);

Here is the original answer.