Resolving Incompatible Pointer Types
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In ISO C, a pointer to void can
be assigned to a pointer of any other type. You do not need to cast
the pointer explicitly. |
C++ allows void pointers to
be assigned only to other void pointers. If you use
C memory functions that return void pointers (such
as malloc(), calloc(), realloc()),
each void pointer must be cast to an appropriate pointer type before
the code is compiled. Note: You can use the
new and delete operators
instead of malloc() and free(). |
The C compiler compiles source code that uses memcmp() to
compare a constant char array to a volatile char array. |
When attempting to compile source code that
uses memcmp() to compare a constant char array
to a volatile char array, the C++ compiler generates
an error message (for example, volatile unsigned char cannot
be converted to a const void pointer). You cannot use a constant pointer
where a volatile pointer is expected unless you cast
a void pointer to the appropriate pointer type before
compiling the code. Note: You can use the
new and delete operators
instead of malloc() and free(). |
| Note: See the ILE C/C++
Language Reference for more detailed information on compatibility.
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