Thread: free() or delete?

  1. #1
    Registered User
    Join Date
    Sep 2002

    free() or delete?

    Can they be used interchangibly (they seem to be able to), and if so, which is better to use (i.e. does every OS/compiler support them, does one have more functionality)?

    And continuing that line of thought, is there a better way than using new? I know there are malloc and things like that... but those are probably not as good to use, correct?

    Thanks a bunch!

  2. #2
    &TH of undefined behavior Fordy's Avatar
    Join Date
    Aug 2001
    Delete usually does the same as free, except that it also calls if you call malloc and then delete, you may end up with a crash

    if you use new, use delete. If malloc, then free....

    In C++ try stick with new/delete

  3. #3
    i want wookie cookies the Wookie's Avatar
    Join Date
    Oct 2002
    you're not supposed to interchange them, new goes with delete and free goes with malloc

    new and delete call the constructor and destructor respectively, malloc and free dont

  4. #4

  5. #5
    C++ introduced new and delete to replace malloc() and free(). So when using C++ just use new and delete, but in C these two are not avilable, so just use malloc() and free() when creating a C program.

  6. #6
    Registered User
    Join Date
    Sep 2002
    the problem is that I was told to use


    should I manually allocate it?

  7. #7
    Registered User
    Join Date
    Jan 2003
    Then use free(). Note that strdup is actually a very common extention, it's not really true C/C++. It's no sin to use malloc, and particularly realloc in C++, if you know what you are doing. In general, you should avoid the whole issue alltogether and use std::string and std::vector and let them handle all such nasty details as cleaning up after themselves.

  8. #8
    Registered User
    Join Date
    Sep 2002
    unfortunately, doing that didn't work. I tried.

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