Consider the Following Class Definitions

question 8

Multiple Choice

Consider the following class definitions:
class bClass
{
Public:
Void set(double a,double b) ;
//Postcondition: x = a; y = b;
Void print() const;
BClass() ;
//Postcondition: x = 0; y = 0;
BClass(double a,double b) ;
//Postcondition: x = a; y = b;
Private:
Double x;
Double y;
};
Class dClass: public bClass
{
Public:
Void set(double a,double b,double c) ;
//Postcondition: x = a; y = b; z = c;
Void print() const;
DClass() ;
//Postcondition: x = 0; y = 0; z = 0 ;
DClass(double a,double b,double c) ;
//Postcondition: x = a; y = b; z = c;
Private:
Double z;
};
Which of the following dClass constructor definitions is valid in C++?

• A) dClass::dClass(double a, double b, double c)
• : bClass()
• {
• X = a;
• Y = b;
• Z = c;
• }
• B) dClass::dClass(double a, double c)
• {
• X = a;
• Z = c;
• }
• C) dClass::dClass(double a, double b)
• : bClass()
• {
• X = a;
• Y = b;
• }
• D) dClass::dClass(double a, double b, double c)
• : bClass(a, b)
• {
• Z = c;
• }

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Definitions:

Business Problem

A challenge or obstacle that hinders the operations or growth of a business, needing strategic solutions.

Business Opportunity

A situation where a person can start a new business or expand an existing one due to favorable conditions in the market.

Research And Experimentation

A systematic activity combining both basic and applied research, aimed at discovering solutions to problems or creating new goods and knowledge.

Validity

The extent to which a concept, conclusion, or measurement is well-founded and likely corresponds accurately to the real world.