C# Online Compiler | .NET Fiddle

<no name> by Anonymous

//GUIRAO, JOHN DARRELL 
//TABI, PETER KESTER C.
//CCP 1103 - ITBC
//AREA OF VARIOUS GEOMETRICAL SHAPE
using System;

namespace AreaOfVariousGeometricalShape
{
    public class AreaOfVariousGeometricalShape
    {
        public static void Main(string[] args)
        {
            string inputOption;
            int option;

            Console.WriteLine("Area of Various Geometrical Shape.");
            Console.WriteLine("Select an option");
            Console.WriteLine("[1] Area of Circle");
            Console.WriteLine("[2] Area of Rectangle");
            Console.WriteLine("[3] Area of Triangle");
            Console.Write("Enter your option: ");
            inputOption = Console.ReadLine();

            if (Int32.TryParse(inputOption, out option) == true)
            {
                if (option == 1)
                {
                    string inputRadius;
                    double radius;
                    double area;

                    Console.Write("Enter radius of the circle: ");
                    inputRadius = Console.ReadLine();

                    if (Double.TryParse(inputRadius, out radius) == true)
                    {
                        if (radius >= 0)
                        {
                            area = 3.1416 * (radius * radius);
                            Console.WriteLine("The area of the circle is {0:#,0.0000}.", area);
                        }
                        else
                        {
                            Console.WriteLine("Input error. Zero or negative value of radius is not allowed.");
                        }
                    }
                    else
                    {
                        Console.WriteLine("Invalid radius. Please input a valid value of radius.");
                    }
                }
                else if (option == 2)
                {
                    string inputLength;
                    string inputWidth;
                    double length;
                    double width;
                    double area;

                    Console.Write("Enter length of the rectangle: ");
                    inputLength = Console.ReadLine();

                    if (Double.TryParse(inputLength, out length) == true)
                    {
                        if (length >= 0)
                        {
                            Console.Write("Enter width of the rectangle: ");
                            inputWidth = Console.ReadLine();

                            if (Double.TryParse(inputWidth, out width) == true)
                            {
                                if (width >= 0)
                                {
                                    area = length * width;
                                    Console.WriteLine("The area of the rectangle is {0:#,0.0000}.", area);
                                }
                                else
                                {
                                    Console.WriteLine("Input error. Zero or negative value of width is not allowed.");
                                }
                            }
                            else
                            {
                                Console.WriteLine("Invalid width. Please input a valid value of width.");
                            }
                        }
                        else
                        {
                            Console.WriteLine("Invalid length. Please input a valid value of length.");
                        }
                    }
                    else
                    {
                        Console.WriteLine("Invalid length. Please input a valid value of length.");
                    }
                }
                else if (option == 3)
                {
                    string inputBase;
                    string inputHeight;
                    double baseTriangle;
                    double height;
                    double area;

                    Console.Write("Enter base of the triangle: ");
                    inputBase = Console.ReadLine();

                    if (Double.TryParse(inputBase, out baseTriangle) == true)
                    {
                        if (baseTriangle >= 0)
                        {
                            Console.Write("Enter the height of the triangle: ");
                            inputHeight = Console.ReadLine();

                            if (Double.TryParse(inputHeight, out height) == true)
                            {
                                if (height >= 0)
                                {
                                    area = 0.5 * baseTriangle * height;
                                    Console.WriteLine("The area of the triangle is {0:#,0.0000}.", area);
                                }
                                else
                                {
                                    Console.WriteLine("Input error. Please input a positive value of height.");
                                }
                            }
                            else
                            {
                                Console.WriteLine("Invalid height. Please input a valid value of height.");
                            }
                        }
                        else
                        {
                            Console.WriteLine("Input error. Please input a positive value of base.");
                        }
                    }
                    else
                    {
                        Console.WriteLine("Invalid base input. Please input a valid value of base.");
                    }
                }
                else
                {
                    Console.WriteLine("Input error. Please select from 1 - 3 only.");
                }
            }
            else
            {
                Console.WriteLine("Invalid option. Please select from 1 - 3 only.");
            }
        }
    }
}

​x
 
//GUIRAO, JOHN DARRELL 
//TABI, PETER KESTER C.
//CCP 1103 - ITBC
//AREA OF VARIOUS GEOMETRICAL SHAPE
using System;
​
namespace AreaOfVariousGeometricalShape
{
    public class AreaOfVariousGeometricalShape
    {
        public static void Main(string[] args)
        {
            string inputOption;
            int option;
​
            Console.WriteLine("Area of Various Geometrical Shape.");
            Console.WriteLine("Select an option");
            Console.WriteLine("[1] Area of Circle");
            Console.WriteLine("[2] Area of Rectangle");
            Console.WriteLine("[3] Area of Triangle");
            Console.Write("Enter your option: ");
            inputOption = Console.ReadLine();
​
            if (Int32.TryParse(inputOption, out option) == true)
            {
                if (option == 1)
                {
                    string inputRadius;
                    double radius;
                    double area;
​
                    Console.Write("Enter radius of the circle: ");
                    inputRadius = Console.ReadLine();
​
                    if (Double.TryParse(inputRadius, out radius) == true)
                    {
                        if (radius >= 0)
                        {
                            area = 3.1416 * (radius * radius);
                            Console.WriteLine("The area of the circle is {0:#,0.0000}.", area);
                        }
                        else
                        {
                            Console.WriteLine("Input error. Zero or negative value of radius is not allowed.");
                        }
                    }
                    else
                    {
                        Console.WriteLine("Invalid radius. Please input a valid value of radius.");
                    }
                }
                else if (option == 2)
                {
                    string inputLength;
                    string inputWidth;
                    double length;
                    double width;
                    double area;
​
                    Console.Write("Enter length of the rectangle: ");
                    inputLength = Console.ReadLine();
​
                    if (Double.TryParse(inputLength, out length) == true)
                    {
                        if (length >= 0)
                        {
                            Console.Write("Enter width of the rectangle: ");
                            inputWidth = Console.ReadLine();
​
                            if (Double.TryParse(inputWidth, out width) == true)
                            {
                                if (width >= 0)
                                {
                                    area = length * width;
                                    Console.WriteLine("The area of the rectangle is {0:#,0.0000}.", area);
                                }
                                else
                                {
                                    Console.WriteLine("Input error. Zero or negative value of width is not allowed.");
                                }
                            }
                            else
                            {
                                Console.WriteLine("Invalid width. Please input a valid value of width.");
                            }
                        }
                        else
                        {
                            Console.WriteLine("Invalid length. Please input a valid value of length.");
                        }
                    }
                    else
                    {
                        Console.WriteLine("Invalid length. Please input a valid value of length.");
                    }
                }
                else if (option == 3)
                {
                    string inputBase;
                    string inputHeight;
                    double baseTriangle;
                    double height;
                    double area;
​
                    Console.Write("Enter base of the triangle: ");
                    inputBase = Console.ReadLine();
​
                    if (Double.TryParse(inputBase, out baseTriangle) == true)
                    {
                        if (baseTriangle >= 0)
                        {
                            Console.Write("Enter the height of the triangle: ");
                            inputHeight = Console.ReadLine();
​
                            if (Double.TryParse(inputHeight, out height) == true)
                            {
                                if (height >= 0)
                                {
                                    area = 0.5 * baseTriangle * height;
                                    Console.WriteLine("The area of the triangle is {0:#,0.0000}.", area);
                                }
                                else
                                {
                                    Console.WriteLine("Input error. Please input a positive value of height.");
                                }
                            }
                            else
                            {
                                Console.WriteLine("Invalid height. Please input a valid value of height.");
                            }
                        }
                        else
                        {
                            Console.WriteLine("Input error. Please input a positive value of base.");
                        }
                    }
                    else
                    {
                        Console.WriteLine("Invalid base input. Please input a valid value of base.");
                    }
                }
                else
                {
                    Console.WriteLine("Input error. Please select from 1 - 3 only.");
                }
            }
            else
            {
                Console.WriteLine("Invalid option. Please select from 1 - 3 only.");
            }
        }
    }
}
​

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