What happens to memory?

Question

C++ / C#

Is there a function that returns a pointer to an array, after it has completed, the memory itself will be released?

char* func()
{
  char* arr = (char*)malloc(100);
  //
 // 
 return arr;
}

Answer 1

Of course not.
The memory will hang in the "busy" heap until someone calls free() on it.

Answer 2

Here comes the old-old song of the Mumiy-Troll group - Run away .

Answer 3

It's not C++, it's C.
C++ has smart pointers for such tasks.