Consider the following class definition class rectangleType { public: //Postcond

Question

Consider the following class definition

class rectangleType
{
    public:
       //Postcondition: length = x; width = y;
       void setLengthWidth(double x, double y);

       //Output length and width;
       void print() const;

       //Calculate and return the area of the rectangle;
       double area();

       //Calculate and return the parameter;
       double perimeter();

       //Postcondition: length = 0; width = 0;
       rectangleType();
       //Postcondition: length = x; width = y;
       rectangleType(double x, double y);

     private:
       double length;
       double width;
};

// and the object declaration

rectangleType bigRect(14,10);

Which of the following statements is correct?

bigRect.setLengthWidth();
       bigRect.setLengthWidth(3.0, 2.0);
       bigRect.length = 2.0;
       bigRect.length = bigRect.width;

A(n) _____ relationship represents composition.

  "has a"
       "is a"
       "part of"
       logical

Explanation / Answer

which of the following statement is correct

bigRect.setLengthWidth (3.0,2.0)

composition is a(n) has a relationship

example of composition

A class contains students. A student cannot exist without a class. There exists composition between class and students

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