Writing Class Definition – Computer Sir Ki Class

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Exam Questions-CBSE12A-2018-02C #CPP#5261    siteicon   siteicon  

Problem Statement - Writing Class Definition

Write the definition of a class CONTAINER in C++ with the following description:
Private Members
– Radius,Height // float
– Type // int (1 for Cone,2 for Cylinder)
– Volume // float
– CalVolume() // Member function to calculate volume as per the Type

Type Formula to calculate Volume
Type 1 – 3.14*Radius*Height
Type 2 – 2 3.14*Radius*Height/3

Public Members
– GetValues() // A function to allow user to enter value of Radius, Height and Type. Also, call
function CalVolume() from it.
– ShowAll() // A function to display Radius, Height, Type and Volume of Container

Solution

TC++ #5261

class CONTAINER
{
  float Radius, Height;
  int Type;
  float Volume;
  void CalVolume();
  public:
  void GetValues();
  void ShowAll();
};
void CONTAINER::GetValues()
{
  cout<<"Enter Radius, Height and Type (1 or 2)";
  cin>>Radius>>Height>>Type ;
  CalVolume();
}
void CONTAINER::ShowAll()
{
  cout<<"Radius ="<<Radius<<endl
      <<"Height ="<<Height<<endl
      <<"Type   ="<<Type<<endl
      <<"Volume ="<<Volume<<endl;
}
void CONTAINER::CalVolume()
{
  if (Type == 1) Volume=3.14*Radius*Height;
  else if (Type == 2) Volume=3.14*Radius*Height/3;
}

 

Notes

float Radius, Height; int Type; float Volume;
These are declaration as required by the question done as a private variables to be used within the class.

void CalVolume();
This is a function prototype declared as private as this function shall be used within the class.

public: void GetValues(); void ShowAll();
These two function prototypes are made public as these functions may have to be used outside class.

void CONTAINER::GetValues() { cout<<“Enter Radius, Height and Type (1 or 2)”; cin>>Radius>>Height>>Type ; CalVolume(); }

This function gets input and calls another private function CalVolume() as desired. Since it is defined outside class the void CONTAINER:: type definition for scope has been given.

Similarly all other functions have been defined.


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CSKC| Created: 4-Dec-2018 | Updated: 5-Dec-2018|CBSE12A-2018









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