ykbharat

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• Mar 26th, 2007

 

ptr=realloc(ptr,newsize);

This function allocates a new memory space of size  newsize to the pointer variable ptr  and returns a pointer to the first byte of the new memory block.
The new size may be smaller or larger than the size.

If the function is unsuccessfull in allocating additional space,it returnas a NULL pointer and the original block is freed.(lost).