Programming Heaven

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 of this program, we need to cover the steps involved in compiling and running it. You can both compile and run your program using Xcode, or you can use the Clang Objective-C compiler in a Terminal window. Let’s go...