Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.c++ > #80712

Re: Trying to understand pointers. Why does this give unexpected results?

Show all headers | View raw

Op 04.jul..2021 om 00:04 schreef Real Troll:
> On 03/07/2021 22:54, rob wrote:
>> Thanks, that helps me.
>>
>>
>>
>>
>>>> This program, compiled w/ gcc 9.3 on Pop_OS 20.04, does not print an
>>>> address for c.  It just prints "c"; this does show addresses for a and
>>>> b.
>>>>
>>>> Why can't I show the address for the char variable c?
>>> You can if you do this:
>>>
>>>    cout << "value of c: " << c << "; address of c: " << (void *)ptrC << endl;
> 
> You could also do something like this:
> 
>> #include <iostream>
>>
>> using namespace std;
>>
>> int main()
>> {
>>    int a = 0;
>>    float b = 1.0;
>>    char c[] = "c";
>>
>>    int *ptrA;
>>    float *ptrB;
>>    char *ptrC;
>>
>>    ptrA = &a;
>>    ptrB = &b;
>>    ptrC = c;
>>
>>    cout << "value of a: " << a << "; address of a: " << ptrA << endl;
>>    cout << "vaue of b: " << b << "; address of b: " << ptrB << endl;
>>    cout << "value of c: " << c << "; address of c: " << &ptrC << endl;

Doesn't that print the address of ptrC, instead of the address of c?

>>
>>    return 0;
>> }
> 
> 
> 

Back to comp.lang.c++ | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Trying to understand pointers.  Why does this give unexpected results? rob <rob@drrob.com> - 2021-07-03 16:12 -0400
  Re: Trying to understand pointers.  Why does this give unexpected results? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-07-03 21:27 +0100
    Re: Trying to understand pointers.  Why does this give unexpected results? rob <rob@drrob.com> - 2021-07-03 17:54 -0400
      Re: Trying to understand pointers. Why does this give unexpected results? Real Troll <real.troll@trolls.com> - 2021-07-03 22:04 +0000
        Re: Trying to understand pointers. Why does this give unexpected results? "Fred. Zwarts" <F.Zwarts@KVI.nl> - 2021-07-15 09:45 +0200
  Re: Trying to understand pointers.  Why does this give unexpected results? Juha Nieminen <nospam@thanks.invalid> - 2021-07-08 08:17 +0000

csiph-web