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From: Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: iso646.h
Date: Fri, 26 Jan 2024 15:41:43 -0800
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Lawrence D'Oliveiro <ldo@nz.invalid> writes:
> On Fri, 26 Jan 2024 22:46:25 +0100, Janis Papanagnou wrote:
>> On 26.01.2024 22:16, Lawrence D'Oliveiro wrote:
>>> On Thu, 25 Jan 2024 14:07:25 +0100, David Brown wrote:
>>> 
>>>> "cout << one() << two() << three();"
>>> 
>>> Those C++ operators for I/O are a brain-dead idea. C-style printf
>>> formats actually work better.
>> 
>> Well, no. There's a reason for using operators.
>
> But remember, you often need to do localized output. Which means parts of 
> a message may need to be reordered for grammatical purposes.
>
> You can do this with printf, but not with C++ output operators.

You can do this with POSIX printf.

POSIX specifies an extension to printf that allows arguments to be
re-ordered.  For example:
    printf("%2$s%1$s\n", "foo", "bar");
prints "barfoo".

ISO C does not have this feature.

Another way to reorder arguments is to construct a string and then print
it.  (String manipulation can be easier in C++ than in C, but that's a
side issue.)

C++'s `cout << ...` has advantages and disadvantages.  It's much more
type-safe than printf, something that's possible only because of C++'s
operator overloading.  I can print something without first looking up
its type and then determining what format string I need to specify that
type.

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for Medtronic
void Void(void) { Void(); } /* The recursive call of the void */