Write a menu driven program in java to find the area of a square.
Answers
Answer:
import java.util.Scanner;
public class KboatMenuArea
{
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
System.out.println("Enter c to calculate area of circle");
System.out.println("Enter s to calculate area of square");
System.out.println("Enter r to calculate area of rectangle");
System.out.print("Enter your choice: ");
char choice = in.next().charAt(0);
switch(choice) {
case 'c':
System.out.print("Enter radius of circle: ");
double r = in.nextDouble();
double ca = (22 / 7.0) * r * r;
System.out.println("Area of circle = " + ca);
break;
case 's':
System.out.print("Enter side of square: ");
double side = in.nextDouble();
double sa = side * side;
System.out.println("Area of square = " + sa);
break;
case 'r':
System.out.print("Enter length of rectangle: ");
double l = in.nextDouble();
System.out.print("Enter breadth of rectangle: ");
double b = in.nextDouble();
double ra = l * b;
System.out.println("Area of rectangle = " + ra);
break;
default:
System.out.println("Wrong choice!");
}
}
}
Explanation:
Hope it helps ^_^
This program is in Java
This program prints the area of Circle, Square, Rectangle, and Triangle, otherwise there was no need for a menu
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import java.util.Scanner;
public class Area_Waala_Program{
public static void main(String [] args){
double a, b, c, s, area = 0;
//Taking input from the user
Scanner sc = new Scanner(System.in);
System.out.println("Area Calculator for Simple Closed Figures");
System.out.println("Press 1 for Circle");
System.out.println("Press 2 for Square");
System.out.println("Press 3 for Rectangle");
System.out.println("Press 4 for Triangle");
double choice = sc.nextDouble();
//Main part comes here
//Circle
if (choice == 1){
System.out.println("Circle");
System.out.print("Enter the Radius: ");
a = sc.nextDouble();
area = Math.PI*a*a;
System.out.println("The area of this Circle is " + area + " sq.unit/s");
}
//Square
if (choice == 2){
System.out.println("Square");
System.out.print("Enter the Side: ");
a = sc.nextDouble();
area = a*a;
System.out.println("The area of this Square is " + area + " sq.unit/s");
}
//Rectangle
if (choice == 3){
System.out.println("Rectangle");
System.out.print("Enter the Length: ");
a = sc.nextDouble();
System.out.print("Enter the Breadth: ");
b = sc.nextDouble();
area = a*b;
System.out.println("The area of this Rectangle is " + area + " sq.unit/s");
}
//Triangle
if (choice == 4){
System.out.println("Triangle");
System.out.print("Enter the measure of the First side: ");
a = sc.nextDouble();
System.out.print("Enter the measure of the Second side: ");
b = sc.nextDouble();
System.out.print("Enter the measure of the Third side: ");
c = sc.nextDouble();
boolean truth = (a+b) > c && (a + c) > b && (b + c) > a;
if (truth == true)
{
s = (a + b + c)/2;
area = Math.sqrt(s * (s - a) * (s - b) * (s - c));
System.out.println("The area of this Triangle is " + area + " sq.unit/s");
}
else if (truth == false){
System.out.println("These sides cannot form a triangle *_*");
}
}
if (choice > 4 || choice < 1){
System.out.println("Valid choices are only 1-4");
}
}
}
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The underlined values are the inputs
Output:
(i)
Area Calculator for Simple Closed Figures
Press 1 for Circle
Press 2 for Square
Press 3 for Rectangle
Press 4 for Triangle
1
Circle
Enter the Radius: 5
The area of this Circle is 78.53981633974483 sq.unit/s
(ii)
Area Calculator for Simple Closed Figures
Press 1 for Circle
Press 2 for Square
Press 3 for Rectangle
Press 4 for Triangle
2
Square
Enter the Side: 7
The area of this Square is 49.0 sq.unit/s
(iii)
Area Calculator for Simple Closed Figures
Press 1 for Circle
Press 2 for Square
Press 3 for Rectangle
Press 4 for Triangle
3
Rectangle
Enter the Length: 10
Enter the Breadth: 13
The area of this Rectangle is 130.0 sq.unit/s
(iv)
Area Calculator for Simple Closed Figures
Press 1 for Circle
Press 2 for Square
Press 3 for Rectangle
Press 4 for Triangle
4
Triangle
Enter the measure of the First side: 52
Enter the measure of the Second side: 48
Enter the measure of the Third side: 20
The area of this Triangle is 480.0 sq.unit/s
(vi)
Area Calculator for Simple Closed Figures
Press 1 for Circle
Press 2 for Square
Press 3 for Rectangle
Press 4 for Triangle
4
Triangle
Enter the measure of the First side: 6
Enter the measure of the Second side: 7
Enter the measure of the Third side: 18
These sides cannot form a triangle *_*
(v)
Area Calculator for Simple Closed Figures
Press 1 for Circle
Press 2 for Square
Press 3 for Rectangle
Press 4 for Triangle
6
Valid choices are only 1-4
