Drawing class:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using SplashKitSDK;
namespace ShapeDrawer
{
public class Drawing
{
private readonly List<Shape> _shapes;
private Color _background;
public Drawing(Color background)
{
_shapes = new List<Shape>();
_background = SplashKit.ColorAzure();
} public Drawing(): this(Color.Azure) { }
public Color Background
{
get
{
return _background;
}
set
{
_background = value;
}
}
public int ShapeCount
{
get { return _shapes.Count; }
}
public void AddShape(Shape s)
{
_shapes.Add(s);
}
public void Draw()
{
SplashKit.ClearScreen(_background);
foreach (Shape s in _shapes)
{
s.Draw();
}
}
public List<Shape> SelectedShapes
{
get
{
List<Shape> result = new List<Shape>();
foreach(Shape s in _shapes)
{
if(s.Selected)
{
result.Add(s);
}
}return result;
}
}
public void SelectShapesAt(Point2D pt)
{
foreach (Shape s in _shapes)
{
if (s.IsAt(pt))
{
s.Selected = true;
}
}
}
public void RemoveShape(Shape s)
{
_shapes.Remove(s);
}
}
}
Program Class:
using System;
using SplashKitSDK;
namespace ShapeDrawer
{
public class Program
{
public static void Main()
{
Drawing myDraw = new Drawing();
new Window("Shape Drawer", 1000, 800);
do
{
SplashKit.ProcessEvents();
SplashKit.ClearScreen();
myDraw.Draw();
if (SplashKit.MouseClicked(MouseButton.LeftButton))
{
Shape myShape = new Shape();
myShape.X = SplashKit.MouseX();
myShape.Y = SplashKit.MouseY();
myShape.color = SplashKit.ColorBisque();
myDraw.AddShape(myShape);
}
if (SplashKit.MouseClicked(MouseButton.RightButton))
{
myDraw.SelectShapesAt(SplashKit.MousePosition());
}
if (SplashKit.KeyDown(KeyCode.DeleteKey) ||
SplashKit.KeyDown(KeyCode.BackspaceKey))
{
foreach (Shape s in myDraw.SelectedShapes)
{
myDraw.RemoveShape(s);
}
}
SplashKit.RefreshScreen();
} while (!SplashKit.WindowCloseRequested("Shape Drawer"));
}
}
}
Shape Class:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using SplashKitSDK;
namespace ShapeDrawer
{
public class Shape
{
private float _x,_y;
private int _height, _width;
private Color _color;
private bool _selected;
public Shape()
{
_x = 0;
_y = 0;
_width = 50;
_height = 50;
_color = SplashKit.ColorAliceBlue();
}
public float X
{
get
{
return _x;
}
set
{
_x = value;
}
}
public float Y
{
get
{
return _y;
}
set
{
_y = value;
}
}
public int Width
{
get
{
return _width;
}
set
{
_width = value;
}
}
public int Height
{
get
{
return _height;
}
set
{
_height = value;
}
}
public Color color
{
get
{
return _color;
}
set
{
_color = value;
}
}
public void Draw()
{
SplashKit.FillRectangle(_color, _x, _y, _width, _height);
if (_selected)
{
this.DrawOutline();
}
}
public void DrawOutline()
{
SplashKit.DrawRectangle(SplashKit.ColorBlack(), _x - 2, _y - 2, _width +
4, _height + 4);
}
public bool IsAt(Point2D pt)
{
if((((pt.X>=_x)&&(pt.X<=(_x+_width)))&&(pt.Y>=_y)&&(pt.Y<=(_y+_height))))
{
return true;
}
else
{
return false;
}
}
public bool Selected
{
get => _selected;
set => _selected = value;
}
}
}
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using System;
namespace Sample
{
class Test
{
public static void Main(string[] args)
{
string name;
name = Console.ReadLine();
Console.WriteLine("Hello {0} ", name);
}
}
}
C# is a general purpose object-oriented programming language by Microsoft. Though initially it was developed as part of .net but later it was approved by ECMA and ISO standards.
You can use C# to create variety of applications, like web, windows, mobile, console applications and much more using Visual studio.
| Data Type | Description | Range | size |
|---|---|---|---|
| int | To store integers | -2,147,483,648 to 2,147,483,647 | 4 bytes |
| double | to store large floating point numbers with decimals | can store 15 decimal digits | 8 bytes |
| float | to store floating point numbers with decimals | can store upto 7 decimal digits | 4 bytes |
| char | to store single characters | - | 2 bytes |
| string | to stores text | - | 2 bytes per character |
| bool | to stores either true or false | - | 1 bit |
datatype variable-name = value;
When ever you want to perform a set of operations based on a condition or set of few conditions IF-ELSE is used.
if(conditional-expression) {
// code
}
else {
// code
}
You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to If-Else-If ladder.
switch(conditional-expression) {
case value1:
// code
break; // optional
case value2:
// code
break; // optional
...
default:
// code to be executed when all the above cases are not matched;
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement) {
// code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while(condition) {
// code
}
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.
data-type[] array-name;
Method is a set of statements which gets executed only when they are called. Call the method name in the main function to execute the method.
static void method-name()
{
// code to be executed
}