G and G conversion specifiers, trailing zeros shall not be removed from the result as they normally are.įor other conversion specifiers, the behavior is undefined. Without this flag, a radix character appears in the result of these conversions only if a digit follows it. , and G conversion specifiers, the result shall always contain a radix character, even if no digits follow the radixĬharacter. For x or X conversion specifiers, a non-zero result Necessary) to force the first digit of the result to be zero. For o conversion, it increases the precision (if # Specifies that the value is to be converted to an alternative form. This means that if the and '+' flags both appear, the flag If the first character of a signed conversion is not a sign or if a signed conversion results in no characters, a With a sign only when a negative value is converted if this flag is not specified. + The result of a signed conversion shall always begin with a sign ( '+' or '-' ). The conversion is right-justified if this flag is not The result of the conversion shall be left-justified within the field. The non-monetary grouping character is used. %g, or %G ) shall be formatted with thousands' grouping characters. The integer portion of the result of a decimal conversion ( %i, %d, %u, %f, %F, The flag characters and their meanings are: ' The position in the argument list (after the format argument) of an integer argument containing the field width or "% n $", where n is a decimal integer in the range giving In this case, the conversion specifier character % (see below) is replaced by the sequence If the format is exhausted while arguments remain, the excess arguments shall be evaluated but are otherwiseĬonversions can be applied to the nth argument after the format in the argument list, rather than to the next unusedĪrgument. The results are undefined if there are insufficient arguments for theįormat. Which shall result in the fetching of zero or more arguments. The format is composed of zero or moreĭirectives: ordinary characters, which are simply copied to the output stream, and conversion specifications, each of The format is aĬharacter string, beginning and ending in its initial shift state, if any. If copying takes place between objects that overlap as a result of a call to sprintf() or snprintf(), the resultsĮach of these functions converts, formats, and prints its arguments under control of the format. Written at the end of the bytes actually written into the array. Otherwise, output bytes beyond the n-1st shall be discarded instead of being written to the array, and a null byte is If n is zero, nothing shall be written and s may be a null pointer. The snprintf() function shall be equivalent to sprintf(), with the addition of the n argument which states '\0', in consecutive bytes starting at * s it is the user's responsibility to ensure that enough space is The sprintf() function shall place output followed by the null byte, Output on the standard output stream stdout. The fprintf() function shall place output on the named output stream. This volume of IEEE Std 1003.1-2001 defers to Requirements described here and the ISO C standard is unintentional. The functionality described on this reference page is aligned with the ISO C standard.
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