using System;

namespace methods

{

class Program

{

static void Main(string[] args)

{

Console.WriteLine(" Hello, this is my more advanced calculator! ");

Console.ReadLine();

menu();

}

static void menu()

{

int options;

Console.BackgroundColor = ConsoleColor.Blue;

Console.ForegroundColor = ConsoleColor.White;

Console.Clear();

Console.WriteLine( " Menu " );

Console.WriteLine( "______________________" );

Console.WriteLine( " 1.Add ") ;

Console.WriteLine( " 2.Subtract " );

Console.WriteLine(" 3.Multiply ");

Console.WriteLine(" 4.Divide ");

Console.WriteLine(" 5.Square Roots ");

Console.WriteLine(" 6.Exit ");

Console.WriteLine(" ");

Console.WriteLine(" ");

Console.WriteLine(" Please select a number from the menu: " );

options = int.Parse(Console.ReadLine());

if ((options < 1) || (options > 6))

{ menu();

}

if (options == 1)

{

add();

}

if (options == 2)

{

subtract();

}

if (options == 3)

{

Multiply();

}

if (options == 4)

{

divide();

}

​

if (options == 5)

{

SquareRoot();

}

if (options == 6)

{

exit();

}

}

static void add()

{

int number1;

int number2;

int answer;

Console.BackgroundColor = ConsoleColor.Gray;

Console.ForegroundColor = ConsoleColor.Green;

Console.Clear();

Console.WriteLine(" I am in the Addition method! ");

Console.WriteLine();

Console.WriteLine(" Please input the first number for me to add; " );

number1 = int.Parse(Console.ReadLine());

Console.WriteLine();

Console.WriteLine(" Please input the second number for me to add: " );

number2 = int.Parse(Console.ReadLine());

answer = number1 + number2;

Console.WriteLine();

Console.WriteLine(number1 + " + " +number2 + " = " + answer);

Console.ReadLine();

menu();

}

static void subtract()

{

int number1;

int number2;

int answer;

Console.BackgroundColor = ConsoleColor.Gray;

Console.ForegroundColor = ConsoleColor.Green;

Console.Clear();

Console.WriteLine(" I am in the Subtraction method! ");

Console.WriteLine();

Console.WriteLine(" Please input the first number for me to subtract: ");

number1 = int.Parse(Console.ReadLine());

Console.WriteLine();

Console.WriteLine(" Please input the second number for me to subtract: ");

number2 = int.Parse(Console.ReadLine());

answer = number1 - number2;

Console.WriteLine();

Console.WriteLine(number1 + " - " + number2 + " = " + answer);

Console.ReadLine();

menu();

}

static void Multiply()

{

int number1;

int number2;

int answer;

Console.BackgroundColor = ConsoleColor.Gray;

Console.ForegroundColor = ConsoleColor.Green;

Console.Clear();

Console.WriteLine(" I am in the multiplication method! ");

Console.WriteLine();

Console.WriteLine(" Please input the first number for me to multiply; ");

number1 = int.Parse(Console.ReadLine());

Console.WriteLine();

Console.WriteLine(" Please input the second number for me to multiply: ");

number2 = int.Parse(Console.ReadLine());

answer = number1 * number2;

Console.WriteLine();

Console.WriteLine(number1 + " * " + number2 + " = " + answer);

Console.ReadLine();

menu();

}

static void divide()

{

int number1;

int number2;

int answer;

Console.BackgroundColor = ConsoleColor.Gray;

Console.ForegroundColor = ConsoleColor.Cyan;

Console.Clear();

Console.WriteLine(" I am in the Divison method! ");

Console.WriteLine();

Console.WriteLine(" Please input the first number for me to divide; ");

number1 = int.Parse(Console.ReadLine());

Console.WriteLine();

Console.WriteLine(" Please input the second number for me to divide: ");

number2 = int.Parse(Console.ReadLine());

answer = number1 / number2;

Console.WriteLine();

Console.WriteLine(number1 + " / " + number2 + " = " + answer);

Console.ReadLine();

menu();

}

static void SquareRoot()

{

double number; //stores a larger number inputed by user

double answer;

Console.BackgroundColor = ConsoleColor.Yellow;

Console.ForegroundColor = ConsoleColor.Cyan;

Console.Clear();

Console.WriteLine(" I am in the SquareRoot method! " );

Console.WriteLine();

Console.WriteLine(" Please enter a number and I will find its SquareRoot! " );

number = int.Parse(Console.ReadLine());

answer = Math.Sqrt(number);

Console.WriteLine(" The SquareRoot of " + number + " is " + answer);

Console.ReadLine();

menu();

}

static void exit()

{

Console.BackgroundColor = ConsoleColor.Black;

Console.ForegroundColor = ConsoleColor.Green;

Console.Clear();

Console.WriteLine(" Thanks for using Anha's more advanced calculator!" );

Console.ReadLine();

Environment.Exit(0);

​

}

}

}