.C - File Extension for C Source Files


File extension C is used for C source code files. A C sample file is provided. Free C compilers are listed.

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File Extension: .C

File Content: C source code.

What is C? C is a general-purpose, block structured, procedural, imperative computer programming language developed in 1972 by Dennis Ritchie at the Bell Telephone Laboratories.

C is the file extension for files storing C source code.

Software applications written in C need to go through three steps to be executed:

  • Compilation - A C compiler is used to compile C source code into object code.
  • Linking - A linker is used to link object code with library code into executable code.
  • Loading - A loader is used to load executable code into memory to run.

C files are text files, which can be edited by any text editors. Here is a sample C file containing the source code of a very simple C application:

#include <stdio.h>
main() {
  printf("Hello world!\n");

C sample file: Click sample.c to download.

C source code stored in C files can be compiled by a number of free C compilers:

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