Answers for "c realloc"

C
2

c realloc

/*prototype of realloc*/
void *realloc(void *ptr, size_t newsize);

/*use*/
dyn_array = realloc(dyn_array, (dyn_array_size + 1) * sizeof(int));

/*
	adds one more space to dyn_array
    you need stdlib.h for this
*/
Posted by: Guest on February-14-2021
1

realloc

int ptr_new = *realloc(void *ptr, size_t size); 
Where 'ptr_new' is the new pointer you want to point to the required Dynamic
memory, 'ptr' is the already existing pointer to a dynamic memory and 'size'
is the new size of dynamic memory that you want to allocate.

Working:
Realloc creates/allocates a new memory in heap with specified size and copies
all the contents from the previous memory pointer to by the pointer 'ptr'.
It the deallocates the memory in heap pointed to by the old pointer i.e, 'ptr'.
Note: pointer 'ptr' should also point to a memory in heap.
Posted by: Guest on July-03-2020
0

realloc in c

void *realloc(void *ptr, size_t size)
Posted by: Guest on April-20-2021
0

realloc in c

#include <stdio.h>
int main () {
   char *ptr;
   ptr = (char *) malloc(10);
   strcpy(ptr, "Programming");
   printf(" %s,  Address = %u\n", ptr, ptr);

   ptr = (char *) realloc(ptr, 20); //ptr is reallocated with new size
   strcat(ptr, " In 'C'");
   printf(" %s,  Address = %u\n", ptr, ptr);
   free(ptr);
   return 0;
}
Posted by: Guest on September-03-2021

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