C++ pointers (and references), once and for all!

pointers.cpp

// `foo` is a completely normal integer.
int foo = 42;

// `bar` is a pointer to an integer. Right now it points to `foo`'s address,
// but may later be reassigned to other addresses.
int *bar = &foo;

// `baz` is a reference to an integer; behaving like a normal integer in
// day-to-day life, only sharing address (and value, obviously) with `foo`.
int &baz = foo;


// Changing `*bar` also changes the value of `foo`:
*bar += 1;  // foo == 43

// Likewise does changing `baz`:
baz -= 1;  // foo == *bar == 42