Can anyone clearly explain about malloc() , calloc() , realloc() function???

Answer 1

Bala Kumaran

calloc() Same principle as malloc(), but it's used to allocate storage. The real difference between these two, is that calloc() initializes all bytes in the allocation block to zero, because it's used to reserve space for dynamic arrays. It's written like this.

source:
https://medium.com/@jraleman/c-programming-language-functions-malloc-calloc-realloc-and-free-61cfc3e45da7

malloc()
In C, the library function malloc is used to allocate a block of memory on the heap. The program accesses this block of memory via a pointer thatmalloc returns. When the memory is no longer needed, the pointer is passed to free which deallocates the memory so that it can be used for other purposes.

source: wikipedia

realloc()

The C library function void *realloc(void *ptr, size_t size) 
attempts to resize the memory block pointed to by ptr that was previously allocated with a call to malloc or calloc.

source:
https://www.tutorialspoint.com/c_standard_library/c_function_realloc.htm

I hope I was helpful

Answer 2

Malloc-
This just allocates the specified memory.

Calloc-
Allocates contiguous block of memory for something like array.

realloc-
Re allocates memory for the specified pointer.

Answer 3

dear devanille, can you explain memory management functions such as malloc(), calloc(), realloc & free () with example program