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Difference between realloc() and free?
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Answer / eswaramoorthy
realloc() is use to reset already allocated memory size.
free() is use to destroy already allocated memory size.
| Is This Answer Correct ? | 26 Yes | 3 No |
Answer / alka
free()is a macro used to deallocate memory.
when we need more memory realoc() reallocate memory
according to given size, if there is no memory 4
alocation ,it will free previous allocated memory &
allocate new one using malloc().
ex: int *p = realloc(p,sizeof(p)*2);
| Is This Answer Correct ? | 15 Yes | 6 No |
Answer / keerthana
realloc() is used to reallocate the memory when the memory
which is already allocate is not sufficient
free() is used to free the memory space
| Is This Answer Correct ? | 5 Yes | 1 No |
Answer / jayasrinivas.donavalli
realloc() can be use to reallocation of the memory if the
memory already created is insufficient,
but free can be used to destroy the memory which was
already created
| Is This Answer Correct ? | 7 Yes | 5 No |
Answer / gouthami..
The free() subroutine frees a block of memory previously allocated by the malloc subroutine. Undefined results occur if the Pointer parameter is not a valid pointer. If the Pointer parameter is a null value, no action will occur.
The realloc() subroutine changes the size of the block of memory pointed to by the Pointer parameter to the number of bytes specified by the Size parameter and returns a new pointer to the block. The pointer specified by the Pointer parameter must have been created with the malloc, calloc, or realloc subroutines and not been deallocated with the free or realloc subroutines. Undefined results occur if the Pointer parameter is not a valid pointer.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / fathimath fahima j
free :
#include <cstdlib>
Void free (void *ptr);
Free() function returns the memory
Pointed to by ptr to the heap.
Realloc :
#include<cstdlib>
Void *realloc(void *ptr,size_t size);
The realloc function changes the size of
the previously allocated memory pointed to by ptr to dat specified by size.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / pratik bokade
✨Free() method is used to dynamically de-allocate the memory.
Syntax: Free(Ptr);
✨Realloc() or reallocation method is used dynamically changed the memory allocation of a previously allocated memory.
Syntax : Ptr=Realloc(Ptr, new size);
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / khadeer.k
realloc():
memory when gets decreased, we can allocate it with the
function called realloc().
free:
it is used to free the memory in the program.
| Is This Answer Correct ? | 7 Yes | 8 No |
Answer / praviss
An existing block of memory which was allocated by malloc() subroutine, will be freed by free() subroutine. In case , an invalid pointer parameter is passed, unexpected results will occur. If the parameter is a null pointer, then no action will occur.
Where as the realloc() subroutine allows the developer to change the block size of the memory which was pointed to by the pointer parameter, to a specified bytes size through size parameter and a new pointer to the block is returned. The pointer parameter specified must have been created by using malloc(),calloc() or realloc() sub routines and should not deallocated with realloc() or free() subroutines. If the pointer parameter is a null pointer, then no action will occur.
| Is This Answer Correct ? | 0 Yes | 1 No |
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