Re: Stroustrup 5.1 Pointers

From:

"mlimber" <mlimber@gmail.com>

Newsgroups:

comp.lang.c++

Date:

26 Mar 2007 18:47:09 -0700

Message-ID:

<1174960029.419026.141610@l77g2000hsb.googlegroups.com>

On Mar 26, 4:50 pm, "dragoncoder" <pktiw...@gmail.com> wrote:

Right, but it won't compile with the const in there (you can't assign
a non-const reference or pointer to a const object) and I was trying
to keep it simple. Const-correctness (see the FAQ) will come later.
Needless to say, I didn't actually test that code. :-)

Cheers! --M

But the type of "Hello World!" is still const char* or const char[] so
it should not be a problem, right ?

No. Try compiling this:

const char str[] = "Hello, World!";
char& c = str[0];

By popular demand (er, confusion), here's a compilable program (still
haven't run it):

#include <iostream>
using namespace std;

void Foo( char& c, char*& r, char** p )
{
   static char str[] = "Hello, World!";
   c = str[ 0 ];
   r = str; // = &str[ 0 ]
   *p = &str[ 7 ];
}

int main()
{
   char c = 0;
   char *ptr1 = &c;
   char *ptr2 = &c;
   Foo( c, ptr1, &ptr2 );
   cout << c << ' ' << ptr1 << ' ' << ptr2 << '\n';
   return 0;
}

Cheers! --M