malloc()

Applications Programming
1

Some one please explain me what is Dynamic memory allocation and the use of malloc() function.How do we allocate memory dynamically and also the other way?

2

Google for "dynamic memory allocation".

Regards

3

Allocating memory for a variable in run-time called Dynamic Memory allocation.

Suppose in certain condition, if you would like to allocate some memory based on a value of an variable then we have to go for the Dynamic Memory allocation.

Simply saying, you can allocate in compile time if you know the exact size for a variable, if not you can allocate in runtime based on a runtime value.

4

There are two other ways:

  • Globally (static arrays declared outside of a function)
  • Locally (declared on the "stack")

There are also ways to allocate "shared memory", which is dynamically memory that other processes can use. There are also a few other, highly nuanced types.