Introduction - If you have any usage issues, please Google them yourself
To achieve a three-dimensional point (x, y, z) of the Point class. Contains a constructor, a copy constructor, this point becomes a negative function negate (), a return to the (0,0,0) of a function of the distance norm (), and a print () function. (1) class Point to achieve an overloaded assignment operator. (2) class Point to achieve overloaded stream insertion operator. (3) Comparison of class Point to achieve overloaded relational operators == and! =. (4) To achieve the overloaded class Point addition+ and subtraction operator-. (5) to achieve an overloaded multiplication operator* to return two Point class object of the dot product.