| Topic: |
DEVELOP > c-Plus-Plus |
| User: |
"" |
| Date: |
17 Aug 2006 08:13:32 AM |
| Object: |
Cannot convert 'const void *' to 'const char *' in C++ |
Hi,
I am using a API I downloaded from the internet programmed in C. I need
the function below which works with this api in my c++ file -
void StoreNoteCallback(void *context, int arglen, const void *args,
OSCTimeTag when,
NetworkReturnAddressPtr returnAddr)
{
const char *typeArgs = (const char *)args;
const float *floatArgs = &typeArgs[OSCPaddedStrlen(args)];
}
The problem is that the gives me the errors -
Cannot convert 'const void *' to 'const char *' in function
StoreNoteCallback
Type mismatch in parameter 's' (wanted 'const char *', got 'const void
*') in function StoreNoteCallback
Cannot convert 'const char *' to 'const float *' in function
StoreNoteCallbac
The above works in a c program. What's the problem and how do I fix it?
Thanks,
Barry.
.
|
|
| User: "Heinz Ozwirk" |
|
| Title: Re: Cannot convert 'const void *' to 'const char *' in C++ |
17 Aug 2006 10:23:08 AM |
|
|
<bg_ie@yahoo.com> schrieb im Newsbeitrag
news:1155820412.467240.249740@b28g2000cwb.googlegroups.com...
Hi,
I am using a API I downloaded from the internet programmed in C. I need
the function below which works with this api in my c++ file -
void StoreNoteCallback(void *context, int arglen, const void *args,
OSCTimeTag when,
NetworkReturnAddressPtr returnAddr)
{
const char *typeArgs = (const char *)args;
const float *floatArgs = &typeArgs[OSCPaddedStrlen(args)];
}
The problem is that the gives me the errors -
Cannot convert 'const void *' to 'const char *' in function
StoreNoteCallback
Type mismatch in parameter 's' (wanted 'const char *', got 'const void
*') in function StoreNoteCallback
Cannot convert 'const char *' to 'const float *' in function
StoreNoteCallbac
What's the signature of OSCPaddedStrlen? Does it expect a const char* or a
const void*. Perhaps you should pass typeArgs to it instead of args.
Heinz
.
|
|
|
|
| User: "Victor Bazarov" |
|
| Title: Re: Cannot convert 'const void *' to 'const char *' in C++ |
17 Aug 2006 08:30:46 AM |
|
|
wrote:
I am using a API I downloaded from the internet programmed in C. I
need the function below which works with this api in my c++ file -
void StoreNoteCallback(void *context, int arglen, const void *args,
OSCTimeTag when,
NetworkReturnAddressPtr returnAddr)
{
const char *typeArgs = (const char *)args;
const float *floatArgs = &typeArgs[OSCPaddedStrlen(args)];
}
The problem is that the gives me the errors -
Cannot convert 'const void *' to 'const char *' in function
StoreNoteCallback
Type mismatch in parameter 's' (wanted 'const char *', got 'const void
*') in function StoreNoteCallback
Which one is 's'? And you should be able to use 'static_cast' to fix
that...
Cannot convert 'const char *' to 'const float *' in function
StoreNoteCallbac
That can be remedied with 'reinterpret_cast'.
The above works in a c program. What's the problem and how do I fix
it?
Use 'reinterpret_cast':
const float *floatArgs = reinterpret_cast<const float*>(&type...
V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask
.
|
|
|
|
| User: "Frederick Gotham" |
|
| Title: Re: Cannot convert 'const void *' to 'const char *' in C++ |
17 Aug 2006 12:49:02 PM |
|
|
Cannot convert 'const void *' to 'const char *'
void *pv = 0;
char *pc;
pc = static_cast<char*>(pv);
--
Frederick Gotham
.
|
|
|
|
|
Related Articles |
|
|
