C program is standard C++ program?

[strutsng]

I want if "a C program is a standard C++ program, but not vice versa"
is a correct statement?

In a C++ program, we can use standard C libraries. However, we cannot
use C++ libraries inside C program.

Please advise. thanks!!

[Jonathan Mcdougall]

st******@gmail. com wrote:

I want if "a C program is a standard C++ program, but not vice versa"
is a correct statement?
No.

void template()
{
}

int main()
{
template();
}

is a valid C, but invalid C++. Check your favorite textbook (you do
have one, don't you?) or google for more informations on C and C++
incompatibiliti es.
In a C++ program, we can use standard C libraries. However, we cannot
use C++ libraries inside C program.

It depends on what you call a "C++ library".

extern "C"
{
void f();
}

Is this a "C++ library"? If yes, then a C program can use some C++
libraries. Your question is too vague.
Jonathan

[Marcus Kwok]

In comp.lang.c++ st******@gmail. com wrote:

I want if "a C program is a standard C++ program, but not vice versa"
is a correct statement?
In most cases, yes, but there are a few cases where this is not true.
For example, if a C program declares identifiers that are now C++
keywords but that are not C keywords. TC++PL has a section on this
topic.
In a C++ program, we can use standard C libraries. However, we cannot
use C++ libraries inside C program.

True.

--
Marcus Kwok

[Marcus Kwok]

> In comp.lang.c++ st******@gmail. com wrote:

In a C++ program, we can use standard C libraries. However, we cannot
use C++ libraries inside C program.

In comp.lang.c++ Marcus Kwok <ri******@gehen nom.net> wrote: True.

After reading Jonathan's post, I will amend this to mean the standard
C++ libraries, e.g., the STL.

--
Marcus Kwok

[Heinz Ozwirk]

<st******@gmail .com> schrieb im Newsbeitrag
news:11******** **************@ g14g2000cwa.goo glegroups.com.. .

I want if "a C program is a standard C++ program, but not vice versa"
is a correct statement?
No. Not every C program is also a valid C++ program. "new", "class" or
"template" to name only a few, are valid identifiers in C, but they are
reserved words in C++. So any C program using one of these identifiers is
not a valid C++ program. Also

void foo();
int main() { foo(1); }

is legal in C, but not in C++
In a C++ program, we can use standard C libraries. However, we cannot
use C++ libraries inside C program.

Just that you can use C libraries in C++ does not imply that C is a subset
of C++. You can also use Pascal or Fortran libraries in C++, but that is no
reason to think that every Pascal or Fortran program is also a C++ program.

Heinz

[Alex Vinokur]

st******@gmail. com wrote:

I want if "a C program is a standard C++ program, but not vice versa"
is a correct statement?

[snip]

int main()
{
char a[3] = "foo";
return 0;
}

It is legal in C, but not in C++.

Alex Vinokur
email: alex DOT vinokur AT gmail DOT com
http://mathforum.org/library/view/10978.html
http://sourceforge.net/users/alexvn

[Emmanuel Delahaye]

st******@gmail. com a écrit :

I want if "a C program is a standard C++ program, but not vice versa"
is a correct statement?
No, it's not

http://david.tribble.com/text/cdiffs.htm

Unfortunately, this link seems to be down at the moment.
Maybe, more information here :

david at tribble dot com
In a C++ program, we can use standard C libraries. However, we cannot
use C++ libraries inside C program.

Correct.

--
C is a sharp tool

[Martin Ambuhl]

st******@gmail. com wrote:

I want if "a C program is a standard C++ program, but not vice versa"
is a correct statement?

It is a grossly erroneous statement. C and C++ are different languages.
There are countless C programs that are not C++ programs.

[John Carson]

"Martin Ambuhl" <ma*****@earthl ink.net> wrote in message
news:F8******** ********@newsre ad3.news.atl.ea rthlink.net

st******@gmail. com wrote:

I want if "a C program is a standard C++ program, but not vice versa"
is a correct statement?

It is a grossly erroneous statement. C and C++ are different
languages. There are countless C programs that are not C++ programs.

"C++ was developed from the C programming language and, with few exceptions,
retains C as a subset."
Bjarne Stroustrup, The C++ Programming Language, 3rd ed., p. 8.
--
John Carson

[Michael Mair]

John Carson wrote:

"Martin Ambuhl" <ma*****@earthl ink.net> wrote in message
news:F8******** ********@newsre ad3.news.atl.ea rthlink.net

st******@gmail. com wrote:

I want if "a C program is a standard C++ program, but not vice versa"
is a correct statement?

It is a grossly erroneous statement. C and C++ are different
languages. There are countless C programs that are not C++ programs.

"C++ was developed from the C programming language and, with few
exceptions, retains C as a subset."
Bjarne Stroustrup, The C++ Programming Language, 3rd ed., p. 8.

This may have been the intent; however, Martin's statement still is
true as C++ semantics differ from C89 in many points.
C99 introduced enough additional non-trivial differences which cannot
be easily overcome. The C standard does not make any claim w.r.t. C++
compatibility, even though there may be a rationale saying exactly
that. I do not own the C++ standard, so I cannot say anything from
this point of view.

Cheers
Michael
--
E-Mail: Mine is an /at/ gmx /dot/ de address.