Programming in Objective-C, Fourth Edition

2. Programming in Objective-C

In this chapter, we dive right in and show you how to write your first Objective-C program. You won’t work with objects just yet; that’s the topic of the next chapter. We want you to understand the steps involved in keying in a program and compiling and running it.

To begin, let’s pick a rather simple example: a program that displays the phrase “Programming is fun!” on your screen. Without further ado, Program 2.1 shows an Objective-C program to accomplish this task.

Program 2.1

// First program example#import <Foundation/Foundation.h>int main (int argc, const char * argv[]){   @autoreleasepool {      NSLog (@"Programming is fun!");   }   return 0;}

Compiling and Running Programs

Before we go into a detailed explanation ...