3.AStarSearch.md

Lesson 3: A* Search

Passed by Reference in C++:

Passed by Value:

int MultiplyByTwo(int i) {
    i = 2*i;
    return i;
}

Passed by Reference:

int MultiplyByTwo(int &i) {
    i = 2*i;
    return i;
}

Constants

const: The variable can only be evaluated at run time, but I promise not to change it after it is initialized.

constexpr: The variable can be evaluated at compile time, and I promise not to change it after it is initialized.