Reallocating Memory Allocated By new
In contrast to C's realloc, it is not possible to directly reallocate memory allocated with new. To extend or reduce the size of a block, one must allocate a new block of adequate size, copy over the old memory, and delete the old block. The C++ standard library provides a dynamic array that can be extended or reduced in its std::vector template.
Read more about this topic: New (C++)
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