Chapter 1: A Tutorial Introduction

Curious, I assumed I’d need the gcc command for this book. The book uses cc. Looks like cc is the Unix C compiler, while gcc ships with the GNU Compiler OS.

The book recommends the old style, apparently. C99 recommends that both the main should be preceded by the explicit return type, and that the argument list should also be explicit. The program builds without them, but you get warnings otherwise.

Hence, the hello_world.c program becomes:

Curiously enough, C doesn’t define standards for exit codes. This is platform dependent.