fprintf_fprintf man page on DigitalUNIX

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Digital UNIX Diffs - printf(5)			Digital UNIX Diffs - printf(5)

       printf, fprintf, sprintf -  Print formatted output

	Standard C Library (libc.so, libc.a)

       #include <stdio.h>

       int printf(
	       const char *format

       int fprintf(
	       FILE *stream,
	       const char *format

       int sprintf(
	       char *string,
	       const char *format

       Specifies  a character string combining literal characters with conver‐
       sion specifications.  Specifies the data to be converted	 according  to
       the  Points to a FILE structure specifying an open stream to which con‐
       verted values will be written.  Points to a character  array  in	 which
       the converted values will be stored.

       vms-vaxc(5): OpenVMS VAX C vs DEC C Differences

       The  ANSI  C Standard padding rules for the printf(3) routines are dif‐
       ferent than the VAX C RTL behavior.  The following examples  illustrate
       the differences:

	    Example		     VAX C RTL DEC C RTL

	    printf("%04.2d",	     77);	  "0077"	 "	   77"
	    printf("%6.4d", 77);      "	    77" "   0077"	printf("%.2g",
       9.876e+2);     "9.88e+02"     "9.9e+02"

       The  ANSI  C  Standard also requires that an empty precision value in a
       printf(3) format specifier be treated as a zero precision.  The	VAX  C
       RTL ignores an empty precision value as shown in the following example.

	    Example		     VAX C RTL DEC C RTL

	    printf("%-.s", "hello"); "hello"	    ""

       The  DEC C RTL will not accept uppercase versions of the printf(3) for‐
       mat specifiers.	For example, the DEC C RTL will not accept "%D"	 as  a
       format  specifier, whereas, the VAX C RTL accepts "%D" as a synonym for
       the "%d" format specifier.  The DEC C RTL  prints  the  letter  encoun‐
       tered;  for  example, "%D" produces the letter "D" in the output stream
       rather than being processed as an output source.

       ultrix-system(5): DEC ULTRIX Operating System Differences

       On Digital UNIX, the printf(3) functions do not support the use of  the
       %D  parameter  for reading long numbers in decimal format as they do on
       DEC ULTRIX.  Instead, use the %d or %ld parameter in your  print	 func‐

       In  Digital  UNIX  the  printf(3)  functions returns the number of dis‐
       playable characters in the output (not necessarily the number of bytes)
       for a success and a negative number for a failure. The value sprintf(3)
       returns for success does not include the	 terminating  '\0'  character.
       In DEC ULTRIX, printf(3) and fprintf(3) return zero for success and EOF
       for failure.  The DEC ULTRIX  sprintf(3)	 function  returns  its	 first
       argument for success and end-of-file (EOF) for failure.

       alpha-32bits(5): 32 vs 64 bit Differences

       When  using  the	 printf()  function for long types, you use the length
       modifier l (lower-case letter L) with the d, i, o, u, x, and X  conver‐
       sion  characters	 to  specify assignment of type long or unsigned long.
       For example, when printing a long as a signed decimal, use %ld  instead
       of  %d. When printing a long as an unsigned decimal, use %lu instead of
       %u. If you omit the length modifier, the type is assumed to be int,  or
       unsigned int, depending on the conversion character.  In this case, the
       long types are converted to the smaller int types and information might
       be lost.

       When  printing a pointer, use %p. If you want to print the pointer as a
       specific representation, the pointer should be cast to  an  appropriate
       integer	type  long  prior  to using the desired format specifier.  For
       example to print a pointer as a long unsigned decimal number,  use  %lu
       as shown:

	    char *p;

	    printf ( "%lp = %lu\n", (void *) &p,  (long) p);

       As  a  rule, to print an integer of arbitrary size, cast the integer to
       long or unsigned long, and use the  %ld	(unsigned  long>>)  conversion
       character. For example:

	    printf ("%ld\n", (long)num);

       32-Bit	   Platform			    |	    AXP	      Platform
					  |	       long		count;
       | long count;
					  |		   printf("COUNT:\n");
       | printf("COUNT:\n"); printf(" decimal  =  %d  \n",  count);|  printf("
       decimal	 =  %ld	 \n",  count);	printf("  unsigned  = %u \n", count);|
       printf(" unsigned = %lu	\n",  count);  printf("	 octal	   =  %o  \n",
       count);|	 printf("  octal     = %lo \n", count); printf(" hex	  = %x
       \n", count);| printf(" hex      = %lx \n", count);

       Functions:  printf(3), fprintf(3), sprintf(3)

	vms-vaxc(5), ultrix-system(5), alpha-32bits(5)

       delim off

						Digital UNIX Diffs - printf(5)

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