printf

Computing Dictionary

printf definition

library
The standard function in the C programming language library for printing formatted output.
The first argument is a format string which may contain ordinary characters which are just printed and "conversion specifications" - sequences beginning with '%' such as %6d which describe how the other arguments should be printed, in this case as a six-character decimal integer padded on the right with spaces.
Possible conversion specifications are d, i or u (decimal integer), o (octal), x, X or p (hexadecimal), f (floating-point), e or E (mantissa and exponent, e.g. 1.23E-22), g or G (f or e format as appropriate to the value printed), c (a single character), s (a string), % (i.e. %% - print a % character). d, i, f, e, g are signed, the rest are unsigned.
The variant fprintf prints to a given output stream and sprintf stores what would be printed in a string variable.
Unix manual page: printf(3).
(1996-12-08)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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