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7. Program to Calculate Area's.
import java.util.Scanner;
class AreaCalculator
{
float l, b, h, r, ba, s, c;
float result = 0f;
float pi = 3.14f;
int var;
public static void main(String[] args)
{
AreaCalculator ar = new AreaCalculator();
ar.options();
}
public void options()
{
Scanner a = new Scanner(System.in);
System.out.println("Enter the Object of which Area is to be calculated \n1:square \n2:rectangle \n3:Triangle\n4:circle\n5:Trapezoid\n6:Repeat\n7:Exit");
var = a.nextInt();
Area a1 = new Area();
if (var == 1)
{
System.out.println("Enter the Side of Square");
s = a.nextFloat();
a1.square(s);
options();
}
else if (var == 2)
{
System.out.println("Enter the Length of Rectangle");
l = a.nextFloat();
System.out.println("Enter the Breadth of Rectangle");
b = a.nextFloat();
a1.rectangle(l, b);
options();
}
else if (var == 3)
{
System.out.println("Enter the Height of Triangle");
h = a.nextFloat();
System.out.println("Enter the Base of Triangle");
ba = a.nextFloat();
a1.triangle(h, ba);
options();
}
else if (var == 4)
{
System.out.println("Enter the Radius of Circle");
r = a.nextFloat();
a1.circle(r);
options();
}
else if (var == 5)
{
System.out.println("Enter the A side of Trapezoid");
b = a.nextFloat();
System.out.println("Enter the B side of Trapezoid");
c = a.nextFloat();
System.out.println("Enter the Height of Trapezoid");
h = a.nextFloat();
a1.trapezoid(b, c, h);
options();
}
}
}
class Area
{
public void square(float s)
{
float result = 0f;
result = s * s;
System.out.println("The Area of Square is :" + result);
}
public void rectangle(float l, float b)
{
float result = 0f;
result = l * b;
System.out.println("The Area of Rectangle is :" + result);
}
public void triangle(float h, float ba)
{
float result = 0f;
result = 0.5f * h * ba;
System.out.println("The Area of Triangle is :" + result);
}
public void circle(float r)
{
float result = 0f;
result = 3.14f * (r * r);
System.out.println("The Area of Circle is :" + result);
}
public void trapezoid(float b, float c, float h)
{
float result = 0f;
result = (((b + c) / 2) * h);
System.out.println("The Area of Trapezoid is :" + result);
}
}
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