Classes 2

1
Classes 2

• CMPSC 201C

2
Class Declaration
class Vector public Vector() x y z
0 Vector (double,double,double)
double getX() const return x double getY()
const return y double getZ() const return
z double magnitude() const private
double x,y,z friend istream operator gtgt
(istream, Vector) friend ostream operator
ltlt (ostream, const Vector)
Constructors
Prototypes of member functions
Data Members
Prototypes of friend functions
3
Using our New Function

• Calling it from the main

// v1 and v2 are objects of class Vector cout ltlt
"adding " ltlt endl v1.adding(v2) cout ltlt v1
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New Function

• In our example we had 4 member functions.
• We are adding a new member

double getX() const return x double
getY() const return y double getZ() const
return z double magnitude() const

• - remember this function is called
• in a way similar to
• v1.adding(v2)
• x, y and z are v1s attributes
• v1 is being modified
• vec2s members are referenced by using dot (.)

Prototype void adding(Vector) Function void
Vectoradding(Vector vec2) xxvec2.x
yyvec2.y zzvec2.z