C-Sharp Atan2 Example – Code Sample Syntax

C-Sharp Atan2 Example – Code Sample Syntax

Purpose: – Illustrates using .

Purpose:
takes 2 double data type numbers and returns a double value
containing the angle (measured in radians) whose tangent is the
quotient of two specified numbers (you can convert
the radians to degrees by multiplying them by Math.PI/180)

Syntax:
Atan2(y as double, x as double)

Parameters Description
y double – y is the y coordinate of a point
x double – x is the x coordinate of a point

Result Data Type Description
double the angle measured in radians. (you can
convert the radians to degrees by multiplying
them by Math.PI/180)

Quick Example
Atan2(1, 1) // Returns .785398163397448

Step 1: Click cs to Cut-n-paste code into clsAtan2.cs

using System;
public class clsAtan2
{
 
    public void Main()
    {
 
 
        //********************************************************************************
        // Purpose: takes 2 double data type numbers and returns a double value 
        // containing the angle (measured in radians) whose tangent is the 
        // quotient of two specified numbers (you can convert 
        // the radians to degrees by multiplying them by Math.PI/180) 
        // 
        // Syntax: 	Atan2(y as double, x as double) 
        //  
        // Parameter1: y - double - y is the y coordinate of a point
        //
        // Parameter2: x - double - x is the x coordinate of a point
        //
        // Result: double - the angle measured in radians. (you can 
        // convert the radians to degrees by multiplying 
        // them by Math.PI/180)
        //
        // Quick Example: Atan2(1, 1) // Returns .785398163397448
        //
        //********************************************************************************
        // This example is from http://idealprogrammer.com
 
        Console.WriteLine("Example #1: 	Atan2(0, 0)");
 
        Console.WriteLine(Math.Atan2(0, 0)); // Returns 0
 
        //write blank line to make output easier to read
        Console.WriteLine();
 
        Console.WriteLine("Example #2: Atan2(1, 1)");
 
        Console.WriteLine(Math.Atan2(1, 1)); // Returns .785398163397448
        //write blank line to make output easier to read
        Console.WriteLine();
 
        Console.WriteLine("Example #3: 	Atan2(1, 2)");
 
 
 
        Console.WriteLine(Math.Atan2(1, 2)); // Returns .463647609000806
 
        //Prevent console from closing before you press enter
        Console.ReadLine();
 
    }
 
}

Step 2: Click cs to Cut-n-paste code into Module1.cs

Module Module1
 
    Sub Main()
 
 
        Dim myclsAtan2 As New clsAtan2
        myclsAtan2.Main()
 
 
 
    End Sub
 
End Module

Prerequistes:

  1. Install C-Sharp (Express or Standard Edition)
  2. Install SQL Server Express
  3. Download Northwind and pubs Database
  4. Attach Northwind Database to Databases in Sql Express
  5. Attach pubs Database to Databases in Sql Express

Notes:

  • Console Application is used to simplify things, but Windows Forms or Web Forms could also be used
  • You can build a library of syntax examples by using same project over and over and just commenting out what you do not want to execute in Module1.cs

Instructions:
C-Sharp Syntax Functions Atan2

  1. Use C-Sharp 2010 Express or Standard Edition
  2. Create new project;
    • Click File/New Project
    • Select Console Application Template
    • Select C-Sharp for Language
    • name of project could be C-Sharp_Syntax.
  3. Add New folder named “Functions”
    • Right-click project name in solution explorer;
    • add new folder;
    • name of folder could be: Functions
  4. Add New subfolder named “MathFunctions”
    • Right-click Functions folder in solution explorer;
    • add new folder;
    • name of folder could be: MathFunctions
  5. Add Class Named clsAtan2 to MathFunctions folder
    • Right-click MathFunctions folder;
    • add new item;
    • Select class
    • Class name could be clsAtan2
  6. Click on cs in code in step 1 above to copy code into clsAtan2.cs
  7. Click on cs in code in step 2 above to copy code into Module1.cs
  8. Click green arrow or press F5 to run program