What is the difference between creating an object,
using 'new' and using 'malloc'?
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Answer Posted / sundaram
?new? is used for dynamic memory allocation in C++,
?malloc()? is used for dynamic memory allocation in C.
?new? allocates memory on heap.
?malloc()? allocates memory on heap.
?new? is operator,
?malloc()? is function
?new? returns memory pointer to the correct object on
SUCCESS,
?malloc? returns pointer to void void* on success
?new? throws exception called ?bad_alloc? on FAILURE,
?malloc? returns NULL on FAILURE
?new? is 2 step process
(i) First Allocates memory for a given object
(ii) Calls corresponding destructor if required
?malloc? is one step process ie it allocating only memory.
| Is This Answer Correct ? | 7 Yes | 2 No |
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how can i access a direct (absolute, not the offset) memory
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here is what i tried:
wrote a program that ask's for an address from the user,
creates a FAR pointer to that adress and shows it. then the
user can increment/decrement the value in that address by
pressing p(inc+) and m(dec-).
NOW, i compiled that program and opened it twice (in 2
different windows) and gave twice the same address to it.
now look what happen - if i change the value in
one "window" of the program, it DOES NOT change in the
other! even if they point to the same address in the memory!
here is the code snippet:
//------------------------------------------------------
#include What is called array?
