By Jiva DeVoe


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We are then declaring another variable, y, which is of type pointer to an int, and within it, we are storing the address of x. Pointers can be used just like regular variables, but when you access them directly, such as what we are doing on line 8 of this program, the value you get is a memory address. 2. Your value for y will probably vary from mine because your computer may be storing your x value at a different address from mine. This is normal. The asterisk operator (*) is also the pointer-dereferencing operator.

In this particular case, this string will be sent as an argument to the NSLog function which will then display it on the console. Go ahead and compile and run this application and view the output. 1. 1 The output of our application Working with Statements and Expressions All Objective-C programs are made up of statements and expressions. Statements are lines of code that exist strictly for the purposes of executing an action. Generally speaking, statements do not have return values, and so therefore do not change the state of the current line of execution except in ways that are side effects of calling the statement.

This part of the process is called compiling the source code. Compiling the source code actually involves several steps. The first step is called preprocessing. You can think of the preprocessing step as the computer preparing your code to be compiled. During this step, the compiler removes any code that will not result in executable code such as comments and so on. It also expands parts of the code and rearranges certain directives so that the second step of the compilation process can be more efficient.

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