These pages concern a computer programming language called "C".

There are many example programs with output. To see the list of examples, click the "Examples" box above (requires JavaScript).

• Allowed variable names in C
• Calculate Armstrong numbers in C
• An example of array initialization in C
• Length of array in C
• Sort an array of strings in C
• Binary search in C using bsearch
• Boggle solver in C
• Pointers in C with examples
• Regular expressions to match C grammar
• C string array initialization
• Techniques for avoiding problems in C programming
• Converting Cairo output to PNG
• Cdecl online server
• Cfunctions - automatically make C header files
• Display CGI environment variables
• Comparison of CGI libraries in C
• Show the types of all the ASCII characters
• Example of command-line arguments in C
• Print today's date in C
• Convert decimal to binary in C
• Detect Shift-JIS bytes in a stream of bytes
• A simple "die" function for C - example of variable number of arguments
• Get the current working directory in Unix in C
• Printf, doubles and decimal places
• Example of a doubly-linked list in C
• Get the full file name of the current executable on Unix
• Fetch a web page using C
• Generate a Fibonacci series in C
• Detecting FILE * buffering
• Detecting whether a file is seekable
• Find a substring of a string in C
• C programming language forum
• C function pointer to function with varying number of arguments
• Get the size of a file in C
• Example of getopt in C
• Read a compressed file with gzFile, gzopen, and gzread in C
• HTTP status codes as C defines
• An example of iconv
• Example of C if statement
• Compare strings ignoring case in C
• An example of an inline qsort
• Example of insertion sort in C
• Join an array of strings to a single string
• Algorithm to convert katakana to hiragana in UTF-8
• C keywords
• Find the largest of n numbers in C
• Calculate the Levenshtein edit distance in C
• C macros __LINE__, __FILE__ and __func__
• List the files in a Unix directory with C
• Mathematical constants in C provided by math.h
• Open a file in C
• Example program in C to detect palindromes
• Web log timestamp to Unix epoch with strptime
• Set the modification time of a PNG
• Create a PNG with text segments
• An example of pointer arithmetic
• Get a list of prime numbers in C
• Print hexadecimal versions of numbers in C
• Left-justify printf output
• Example of quicksort in C
• Example of random number generation in C
• Read a whole file into memory in C
• Recursively list directories in C
• Make a reentrant parser with Flex and Bison
• Program to reverse a string without using the string library
• Create a header file from a C file
• Set and get environment variables in C
• Example of a singly-linked list in C
• Split a C string on whitespace
• SQLite C example: bind data
• SQLite C example: insert data
• SQLite C example: select data
• C string libraries
• Convert a string to a double in C
• Convert a string to an integer in C
• Strip leading and trailing space in C
• Stupid mistakes in C programming
• Example of C switch
• Useful tools for C programmers
• Example of typeof to make a "swap" macro.
• An example of ualarm and setjmp
• C routine to convert UCS2 to UTF-8
• An example of using regular expressions in C
• Programming UNIX Sockets in C - Frequently Asked Questions
• C routine to convert UTF-8 to UCS2
• Check for valid C variable names
• Web sites about C
• Write a PNG file using C and libpng
• Xlib window which tells its own position and size
• Responding to resize events with Xlib
• A simple text window using Xlib
• Responding to window deletion messages from the window manager
• Open and read a gzip compressed file with zlib in C
• An example of compressing with zlib in C
• Find the source code of a library function in FreeBSD
• Get information on network interfaces in FreeBSD
• Example of ptrace for FreeBSD
• Add the location of a shared library when compiling
• Approximate length of a cubic bezier curve
• Listing available typefaces with Pango
• Perl XS
• Using Unicode with Perl XS
• Tantei CD-ROM dialogue extracter
• The mysterious case of the missing Base64 library
• What characters are illegal in a Unix filename?
• Get a hash value using XS
• An example of using regular expressions in Perl XS