Formatted printing in C.

• An example of using va_copy (29 July 2016)
• Example of calling printf from assembly on FreeBSD (9 November 2015)
• Get a varargs-like vprintf or vfprintf in Go (28 September 2015)
• Print part of a string with printf (3 May 2012)
• Printf, doubles and decimal places (9 August 2011)
• Print hexadecimal versions of numbers in C (9 August 2011)
• Left-justify printf output (9 August 2011)