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C++ Notes and Information

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Memory

There are two areas of memory, Stack, and Heap.

Stack	When scope for variable ends, the memory is freed.

Heap	Stays there until manually removed with `delete`

new keyword

The new keyword allocates memory from the Heap. It returns a pointer to it. The number of bytes to allocated is determined by the argument. int provides 4 bytes, for example.

int * a = new int;
 
*a = 2;
 
std::cout << *a << std::endl;

int * a = new int;
// is nearly identical to this:
int * a = malloc(4);

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