Advanced Mac OS X Programming: The Big Nerd Ranch Guide

Exercises

1. Rewrite this function as a block:

   i​n​t​ ​k​(​v​o​i​d​)​ ​{​
    ​ ​ ​ ​r​e​t​u​r​n​ ​1​;​
   }​
   

2. Write a function create_k that accepts a single integer argument i and returns a block. The returned block accepts no arguments and always returns the value of i passed to create_k(). Use this function in a test program. (Be careful with the block memory management!)

3. Define two blocks called add_one and add_two that accept no arguments and return nothing. These should both increment the same integer by one or two. (You will need the __block storage specifier.)

4. Use typedefs to simplify the following block reference declaration:

   i​n​t​ ​(​^​(​*​(​^​g​e​t​_​b​l​o​c​k​_​f​a​c​t​o​r​y​_​f​u​n​c​p​t​r​)​(​v​o​i​d​)​)​(​i​n​t​)​)​(​v​o​i​d​)​;​  ...