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Groups > comp.lang.c++ > #14218
| From | Stanley Rice <heconghui@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | use unintialized_copy where is initialized |
| Date | 2012-02-17 19:03 -0800 |
| Organization | http://groups.google.com |
| Message-ID | <6193789.0.1329534189450.JavaMail.geo-discussion-forums@pbie8> (permalink) |
`the difference between *uninitialized_copy* function and *copy* is that the
*uninitialized_copy* function could copy the object at the location where
is uninitialized. For example:
int ia[5] = {1, 2, 3, 4, 5};
int n = sizeof ia / sizeof *ia;
int *ib = (int *)malloc(n * sizeof *ia);
uninitialized_copy(ia, ia + n, ib);
My question is, what if I copy the initialized memory by calling the
uninitialized_copy function. Instead of allocatiing the memory by calling
malloc, I use new.
int *ib = new int[n];
uninitialized_copy(ia, ia + n, ib);
I works too. But am i correct? If so, what's the difference between copy
and uninitialized_copy?
Thanks.
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use unintialized_copy where is initialized Stanley Rice <heconghui@gmail.com> - 2012-02-17 19:03 -0800 Re: use unintialized_copy where is initialized Paavo Helde <myfirstname@osa.pri.ee> - 2012-02-18 03:05 -0600
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