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(Storage): Minor cleanups.

This commit is contained in:
Richard Stallman 2022-09-22 21:55:08 -04:00
parent 38863b1f44
commit 9a2d8740fe
1 changed files with 16 additions and 12 deletions
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c.texi
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@ -1182,12 +1182,15 @@ programs which consist of more than one source file.
@cindex storage organization @cindex storage organization
@cindex memory organization @cindex memory organization
Storage in C programs is made up of units called @dfn{bytes}. On Storage in C programs is made up of units called @dfn{bytes}. A byte
nearly all computers, a byte consists of 8 bits, but there are a few is the smallest unit of storage that can be used in a first-class
manner.
On nearly all computers, a byte consists of 8 bits. There are a few
peculiar computers (mostly ``embedded controllers'' for very small peculiar computers (mostly ``embedded controllers'' for very small
systems) where a byte is longer than that. This manual does not try systems) where a byte is longer than that, but this manual does not
to explain the peculiarity of those computers; we assume that a byte try to explain the peculiarity of those computers; we assume that a
is 8 bits. byte is 8 bits.
Every C data type is made up of a certain number of bytes; that number Every C data type is made up of a certain number of bytes; that number
is the data type's @dfn{size}. @xref{Type Size}, for details. The is the data type's @dfn{size}. @xref{Type Size}, for details. The
@ -1247,7 +1250,7 @@ printf ("Average is %f\n",
The code that calls @code{printf} must pass a @code{double} for The code that calls @code{printf} must pass a @code{double} for
printing with @samp{%f} and an @code{int} for printing with @samp{%d}. printing with @samp{%f} and an @code{int} for printing with @samp{%d}.
If the argument has the wrong type, @code{printf} will produce garbage If the argument has the wrong type, @code{printf} will produce meaningless
output. output.
Here's a complete program that computes the average of three Here's a complete program that computes the average of three
@ -1417,7 +1420,8 @@ This declares @code{nums_to_average} so each of its elements is a
However, while you @emph{can} combine them, that doesn't mean you However, while you @emph{can} combine them, that doesn't mean you
@emph{should}. If it is useful to write comments about the variables, @emph{should}. If it is useful to write comments about the variables,
and usually it is, then it's clearer to keep the declarations separate and usually it is, then it's clearer to keep the declarations separate
so you can put a comment on each one. so you can put a comment on each one. That also helps with using
textual tools to find occurrences of a variable in source files.
We set all of the elements of the array @code{nums_to_average} with We set all of the elements of the array @code{nums_to_average} with
assignments, but it is more convenient to use an initializer in the assignments, but it is more convenient to use an initializer in the
@ -1710,12 +1714,12 @@ You can also include other characters, even non-ASCII characters, in
identifiers by writing their Unicode character names, which start with identifiers by writing their Unicode character names, which start with
@samp{\u} or @samp{\U}, in the identifier name. @xref{Unicode @samp{\u} or @samp{\U}, in the identifier name. @xref{Unicode
Character Codes}. However, it is usually a bad idea to use non-ASCII Character Codes}. However, it is usually a bad idea to use non-ASCII
characters in identifiers, and when they are written in English, they characters in identifiers, and when the names are written in English,
never need non-ASCII characters. @xref{English}. they never need non-ASCII characters. @xref{English}.
Whitespace is required to separate two consecutive identifiers, or to As stated above, whitespace is required to separate two consecutive
separate an identifier from a preceding or following numeric identifiers, or to separate an identifier from a preceding or
constant. following numeric constant.
@node Operators/Punctuation @node Operators/Punctuation
@section Operators and Punctuation @section Operators and Punctuation