Thread: Equiv of Realloc in C++?

  1. #1
    Registered User
    Join Date
    Aug 2001

    Equiv of Realloc in C++?

    As I'm sitting here going through some old posts on the differences between the new/delete vs. malloc/free approaches to allocating memory I came up with a question.

    What is the new/delete approach to realloc? How is this accomplished?

    Let's say I create an int array ...

    int *x = new int [5];
    /*And later in my program I *may* need to reallocate 
    that int to 10 elements.  How can this be done with the 
    new/delete approach?*/

  2. #2
    S­énior Member
    Join Date
    Jan 2002
    There's no direct equivalent. You'll either have to allocate a new array of the extended size, copy the old contents across and then delete the old array, or use std::vector.

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