Write a Menu-driven program to calculate the area of different shapes based on the user choice.
Menu to calculate area of different shapes:
Enter 1 to calculate the area of a circle.
Enter 2 to calculate the area of a triangle.
Enter 3 to calculate the area of a square.
Enter 4 to calculate the area of a rectangle.
Enter 5 to terminate the program.
Formulae for area of different shapes:
Area of a circle = 3.14159265358979323846 * radius * radius
Area of a triangle = (1/2) * base * height
Area of a square = side * side
Area of a rectangle = length * breadth
Approach: To solve the problem, follow the below idea:
The approach is to use Switch-case to make different cases for different choices. The switch case should run until the user enters 5 to terminate the program. Use break statement to avoid fall-through between cases.
Below is the implementation of the approach:
#include <iostream>
using namespace std;
// function to return area of a circle
double getCircleArea(double radius)
{
return (3.14159265358979323846 * radius * radius);
}
// function to return area of a triangle
double getTriangleArea(double base, double height)
{
return (base * height * 0.5);
}
// function to return area of a square
double getSquareArea(double side) { return side * side; }
// function to return area of a rectangle
double getRectangleArea(double length, double breadth)
{
return length * breadth;
}
int main()
{
bool flag = true;
while (flag) {
cout << "Enter 1 to calculate the area of a circle"
<< endl;
cout
<< "Enter 2 to calculate the area of a triangle"
<< endl;
cout << "Enter 3 to calculate the area of a square"
<< endl;
cout << "Enter 4 to calculate the area of a "
"rectangle"
<< endl;
cout << "Enter 5 to terminate the program" << endl;
int choice;
cin >> choice;
switch (choice) {
case 1:
cout << "Enter radius: ";
double radius;
cin >> radius;
cout << "Area = " << getCircleArea(radius)
<< endl;
break;
case 2:
cout << "Enter base: ";
double base, height;
cin >> base;
cout << "Enter height: ";
cin >> height;
cout << "Area = "
<< getTriangleArea(base, height) << endl;
break;
case 3:
cout << "Enter side length: ";
double side;
cin >> side;
cout << "Area = " << getSquareArea(side)
<< endl;
break;
case 4:
cout << "Enter length: ";
double length, breadth;
cin >> length;
cout << "Enter breadth: ";
cin >> breadth;
cout << "Area = "
<< getRectangleArea(length, breadth)
<< endl;
break;
case 5:
flag = false;
break;
default:
cout << "Invalid Choice" << endl;
}
}
cout << "Program terminated" << endl;
return 0;
}
import java.util.Scanner;
public class AreaCalculator {
// function to return area of a circle
static double getCircleArea(double radius) {
return Math.PI * radius * radius;
}
// function to return area of a triangle
static double getTriangleArea(double base, double height) {
return base * height * 0.5;
}
// function to return area of a square
static double getSquareArea(double side) {
return side * side;
}
// function to return area of a rectangle
static double getRectangleArea(double length, double breadth) {
return length * breadth;
}
public static void main(String[] args) {
boolean flag = true;
Scanner scanner = new Scanner(System.in);
while (flag) {
try {
System.out.println("Enter 1 to calculate the area of a circle");
System.out.println("Enter 2 to calculate the area of a triangle");
System.out.println("Enter 3 to calculate the area of a square");
System.out.println("Enter 4 to calculate the area of a rectangle");
System.out.println("Enter 5 to terminate the program");
int choice = scanner.nextInt();
switch (choice) {
case 1:
System.out.print("Enter radius: ");
double radius = scanner.nextDouble();
System.out.println("Area = " + getCircleArea(radius));
break;
case 2:
System.out.print("Enter base: ");
double base = scanner.nextDouble();
System.out.print("Enter height: ");
double height = scanner.nextDouble();
System.out.println("Area = " + getTriangleArea(base, height));
break;
case 3:
System.out.print("Enter side length: ");
double side = scanner.nextDouble();
System.out.println("Area = " + getSquareArea(side));
break;
case 4:
System.out.print("Enter length: ");
double length = scanner.nextDouble();
System.out.print("Enter breadth: ");
double breadth = scanner.nextDouble();
System.out.println("Area = " + getRectangleArea(length, breadth));
break;
case 5:
flag = false;
break;
default:
System.out.println("Invalid Choice");
}
} catch (java.util.NoSuchElementException e) {
System.out.println("No input provided. Exiting...");
break;
}
}
System.out.println("Program terminated");
scanner.close();
}
}
import math
# Function to return area of a circle
def get_circle_area(radius):
return math.pi * radius**2
# Function to return area of a triangle
def get_triangle_area(base, height):
return 0.5 * base * height
# Function to return area of a square
def get_square_area(side):
return side**2
# Function to return area of a rectangle
def get_rectangle_area(length, breadth):
return length * breadth
# Main program
flag = True
while flag:
print("Enter 1 to calculate the area of a circle")
print("Enter 2 to calculate the area of a triangle")
print("Enter 3 to calculate the area of a square")
print("Enter 4 to calculate the area of a rectangle")
print("Enter 5 to terminate the program")
choice = int(input("Enter your choice: "))
if choice == 1:
radius = float(input("Enter radius: "))
print("Area =", get_circle_area(radius))
elif choice == 2:
base = float(input("Enter base: "))
height = float(input("Enter height: "))
print("Area =", get_triangle_area(base, height))
elif choice == 3:
side = float(input("Enter side length: "))
print("Area =", get_square_area(side))
elif choice == 4:
length = float(input("Enter length: "))
breadth = float(input("Enter breadth: "))
print("Area =", get_rectangle_area(length, breadth))
elif choice == 5:
flag = False
else:
print("Invalid Choice")
print("Program terminated")
using System;
public class Scanner : IDisposable
{
private readonly System.IO.TextReader _reader;
private string _inputBuffer = string.Empty;
public Scanner(System.IO.TextReader reader = null)
{
_reader = reader ?? Console.In;
}
public void Dispose()
{
_reader.Dispose();
}
public int NextInt()
{
return int.Parse(Next());
}
public double NextDouble()
{
return double.Parse(Next());
}
private string Next()
{
if (string.IsNullOrEmpty(_inputBuffer))
{
_inputBuffer = _reader.ReadLine();
if (_inputBuffer == null)
{
throw new InvalidOperationException("Not enough input.");
}
}
var tokens = _inputBuffer.Split(new[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
if (tokens.Length == 0)
{
throw new InvalidOperationException("Not enough input.");
}
_inputBuffer = string.Empty;
return tokens[0];
}
public void ClearBuffer()
{
_inputBuffer = string.Empty;
}
}
public class AreaCalculator
{
// function to return area of a circle
static double GetCircleArea(double radius)
{
return Math.PI * radius * radius;
}
// function to return area of a triangle
static double GetTriangleArea(double baseLength, double height)
{
return baseLength * height * 0.5;
}
// function to return area of a square
static double GetSquareArea(double side)
{
return side * side;
}
// function to return area of a rectangle
static double GetRectangleArea(double length, double breadth)
{
return length * breadth;
}
public static void Main(string[] args)
{
bool flag = true;
Scanner scanner = new Scanner();
while (flag)
{
try
{
Console.WriteLine("Enter 1 to calculate the area of a circle");
Console.WriteLine("Enter 2 to calculate the area of a triangle");
Console.WriteLine("Enter 3 to calculate the area of a square");
Console.WriteLine("Enter 4 to calculate the area of a rectangle");
Console.WriteLine("Enter 5 to terminate the program");
int choice = scanner.NextInt();
switch (choice)
{
case 1:
Console.Write("Enter radius: ");
double radius = scanner.NextDouble();
Console.WriteLine("Area = " + GetCircleArea(radius));
break;
case 2:
Console.Write("Enter base: ");
double baseLength = scanner.NextDouble();
Console.Write("Enter height: ");
double height = scanner.NextDouble();
Console.WriteLine("Area = " + GetTriangleArea(baseLength, height));
break;
case 3:
Console.Write("Enter side length: ");
double side = scanner.NextDouble();
Console.WriteLine("Area = " + GetSquareArea(side));
break;
case 4:
Console.Write("Enter length: ");
double length = scanner.NextDouble();
Console.Write("Enter breadth: ");
double breadth = scanner.NextDouble();
Console.WriteLine("Area = " + GetRectangleArea(length, breadth));
break;
case 5:
flag = false;
break;
default:
Console.WriteLine("Invalid Choice");
break;
}
}
catch (InvalidOperationException e)
{
Console.WriteLine(e.Message);
break;
}
}
Console.WriteLine("Program terminated");
}
}
// Function to return area of a circle
function getCircleArea(radius) {
return Math.PI * Math.pow(radius, 2);
}
// Function to return area of a triangle
function getTriangleArea(base, height) {
return 0.5 * base * height;
}
// Function to return area of a square
function getSquareArea(side) {
return Math.pow(side, 2);
}
// Function to return area of a rectangle
function getRectangleArea(length, breadth) {
return length * breadth;
}
// Main program
let flag = true;
while (flag) {
console.log("Enter 1 to calculate the area of a circle");
console.log("Enter 2 to calculate the area of a triangle");
console.log("Enter 3 to calculate the area of a square");
console.log("Enter 4 to calculate the area of a rectangle");
console.log("Enter 5 to terminate the program");
let choice = prompt("Enter your choice: ");
if (choice == 1) {
let radius = parseFloat(prompt("Enter radius: "));
console.log("Area =", getCircleArea(radius));
} else if (choice == 2) {
let base = parseFloat(prompt("Enter base: "));
let height = parseFloat(prompt("Enter height: "));
console.log("Area =", getTriangleArea(base, height));
} else if (choice == 3) {
let side = parseFloat(prompt("Enter side length: "));
console.log("Area =", getSquareArea(side));
} else if (choice == 4) {
let length = parseFloat(prompt("Enter length: "));
let breadth = parseFloat(prompt("Enter breadth: "));
console.log("Area =", getRectangleArea(length, breadth));
} else if (choice == 5) {
flag = false;
} else {
console.log("Invalid Choice");
}
}
console.log("Program terminated");
Output:
Enter 1 to calculate the area of a circle
Enter 2 to calculate the area of a triangle
Enter 3 to calculate the area of a square
Enter 4 to calculate the area of a rectangle
Enter 5 to terminate the program
1
Enter radius: 14
Area = 615.752
Enter 1 to calculate the area of a circle
Enter 2 to calculate the area of a triangle
Enter 3 to calculate the area of a square
Enter 4 to calculate the area of a rectangle
Enter 5 to terminate the program
2
Enter base: 10
Enter height: 20
Area = 100
Enter 1 to calculate the area of a circle
Enter 2 to calculate the area of a triangle
Enter 3 to calculate the area of a square
Enter 4 to calculate the area of a rectangle
Enter 5 to terminate the program
3
Enter side length: 10
Area = 100
Enter 1 to calculate the area of a circle
Enter 2 to calculate the area of a triangle
Enter 3 to calculate the area of a square
Enter 4 to calculate the area of a rectangle
Enter 5 to terminate the program
4
Enter length: 5
Enter breadth: 10
Area = 50
Enter 1 to calculate the area of a circle
Enter 2 to calculate the area of a triangle
Enter 3 to calculate the area of a square
Enter 4 to calculate the area of a rectangle
Enter 5 to terminate the program
9
Invalid Choice
Enter 1 to calculate the area of a circle
Enter 2 to calculate the area of a triangle
Enter 3 to calculate the area of a square
Enter 4 to calculate the area of a rectangle
Enter 5 to terminate the program
5
Program terminated
Time Complexity: O(1)
Auxiliary Space: O(1)
