Helpful tutorials on YouTube are by TheChernoProject https://www.youtube.com/channel/UCQ-W1KE9EYfdxhL6S4twUNw

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

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);

Use Control-K, followed by Control-F. 7/5/2019

C++ classes (and often function prototypes) are normally split up into two files. The header file has the extension of .h and contains class definitions and functions. The implementation of the class goes into the .cpp file. By doing this, if your class implementation doesn’t change then it won’t need to be recompiled….

separatecompilation.pdf

Use Arrow when the value on the left is a pointer, use a dot when it is a class instance.

To access members of a structure, use the dot operator. To access members of a structure through a pointer, use the arrow operator. Details