Why free() doesn't really frees memory?

Question

i\'m doing some tests allocating and deallocating memory. This is the code i\'m using:

#include 
#include 

#define WAVE_SIZE          


        

Answer 1

When the system memory will be actually released depends on the OS.

Foe example in Windows, even if you close a program, the memory is not released at the same time. It is made in order to reuse it on the next program start.