.cc vs .cpp: Which C File Extension Should You Use?

C File Extension: Demystifying .cc vs. .cpp

In the realm of C development, the choice between .cc and .cpp file extensions for code files can raise questions. This article delves into the nuances of these extensions, their origins, and the recommended practices in different contexts.

Historically, .cc originated from Sun's C compiler and is primarily used on RISC systems. It designates that the file contains C code with a .o object file counterpart. On the other hand, .cpp emerged as the more common extension for C code on various platforms, including Linux. It signifies a preprocessed C code file that's intended to be further compiled into a .o object file.

The choice between .cc and .cpp often comes down to personal preference or team standards. However, in Linux environments, .cpp is the more widely used and supported extension. Compilers can handle both formats, so from a technical standpoint, there's no significant difference in functionality.

Google's style guide, as mentioned, advocates for the use of .cc. This is primarily a matter of consistency within the Google ecosystem. Other organizations, such as Boost and Mozilla, also favor .cc. However, in Linux systems, .cpp remains the more prevalent choice.

Ultimately, the decision between .cc and .cpp is not a matter of right or wrong. As a developer, it's important to align with the conventions adopted within your team or organization. If no specific guidelines are established, then opting for .cpp is a safe choice, given its widespread adoption in Linux environments.

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