1.

A superclass Perimeter has been defined to calculate the perimeter of a parallelogram. Define a subclass Area to compute the area of the parallelogram by using the required data members of the superclass. The details are given below:Class name: Perimeter Data members/instance variables: a: to store the length in decimal b: to store the breadth in decimal Member functions: Perimeter (…): parameterized constructor to assign values to data members double Calculate(): calculate and return the perimeter of a parallelogram is 2* (length + breadth) void show(): to display the data members along with the perimeter of the parallelogramClass name: Area Data members/instance variables: h: to store the height in decimal area: to store the area of the parallelogram Member functions: Area(…): parameterized constructor to assign values to data members of both the classes void doarea(): compute the area as (breadth * height) void show(): display the data members of both classes along with the area and perimeter of the parallelogram. Specify the class Perimeter giving details of the constructor (…), double Calculate and void show (). Using the concept of inheritance, specify the class Area giving details of the constructor (…), void doarea () and void show (). The main function and algorithm need not be written.

Answer»

import java.util.*; 

class Perimeter 

{ 

protected double a,b; 

Perimeter(double aa, double bb) 

{ 

a=aa; 

b=bb; 

} 

double Calculate() 

{ 

return (2*(a+b)); } 

void show()

{ 

System.out.print("\n Length = " + a); 

System.out.print("\n Breadth = " + b); 

System.out.print("\n Perimeter =" + Calculate()); 

} 

} 

importjava.util.*; 

class Area extends Perimeter 

{

double h; 

double area; 

Area(double aa, double bb, double cc) 

{ super(aa, bb); 

h=cc; } 

void doarea() 

{ 

area=super.b*h; 

} void show() 

{ super, show(); 

System, out.print("\n Height = " + h);

System.out.print("\n Area = " + area); 

} 

}


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