Difference between revisions of "Intro Week 10"
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Console Example [http://iam.colum.edu/oop/gbrowser.php?file=/classsource/class4/dog1/Dog.cs Dog.cs] <br /> | Console Example [http://iam.colum.edu/oop/gbrowser.php?file=/classsource/class4/dog1/Dog.cs Dog.cs] <br /> | ||
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Console Example [http://iam.colum.edu/oop/gbrowser.php?file=/classsource/class4/dogOverload.cs dogOverload.cs] | Console Example [http://iam.colum.edu/oop/gbrowser.php?file=/classsource/class4/dogOverload.cs dogOverload.cs] | ||
Revision as of 18:29, 25 January 2016
Constructors
A classes constructor is the method that is run when an instance of the class is created. If you do not provide a constructor the compiler provides one for you. The constructor is used to initiate all member properties. Unlike intrinsic types variables that are not initialized will be set to 0 or "" or null by the compiler in the default constructor.
The constructor allows you to set default values for the properties of the class. If you do not provide a constructor then a default constructor will be provided. The default constructor will initialize all of the properties in the class to empty/zero/null values.
constructor example
1 public class Dog
2 {
3 public Dog()
4 {
5 //constructor code
6 }
7 }
Simple Dog class with constructor
1 //Dog simple class definition
2 public class Dog
3 {
4 public string Name; // the dog's name
5 public int Age; // the dog's age
6 public int Weight; // the dog's weight
7 public string BarkSound; // the sound of the dog's bark
8
9 public Dog()
10 {
11 BarkSound = "Woof!!!";
12 }
13
14 public void Bark() {
15 //put bark code here
16 }
17 public void Eat() {
18 //put eat code here
19 }
20 }
Console Example Dog.cs
OverLoading Constructors
Overloading a constructor allows object creation to happen in different ways with different parameters. The class can be overloaded to accept different parameters but each constructor method must have a unique parameter signature. Dog class with overloaded constructor
1 //Dog overloaded class definition
2 public class Dog
3 {
4 public string Name; // the dog's name
5 public int Age; // the dog's age
6 public int Weight; // the dog's weight
7 public string BarkSound; // the sound of the dog's bark
8
9 public Dog()
10 {
11 BarkSound = "Woof!!!";
12 }
13 public Dog(string newName)
14 {
15 Name = newName;
16 BarkSound = "Woof!!!";
17 }
18 public Dog(string newName, string newBarkSound )
19 {
20 Name = newName;
21 BarkSound = newBarkSound;
22 }
23
24 public void Bark() {
25 //put bark code here
26 }
27 public void Eat() {
28 //put eat code here
29 }
30 public string About() {
31 string strAbout = "";
32 strAbout += this.Name;
33 strAbout += " " + this.Age;
34 strAbout += " " + this.Weight;
35 strAbout += " " + this.BarkSound;
36 return strAbout;
37 }
38
39 }
40
41 }
Console Example dogOverload.cs
Art as a windows app
Art history flash cards
Intro To Programming Art Flash Cards
As a windows app
http://iam.colum.edu/introtoprogramming/jeff/sp10/WindowsFormsApplicationArts.zip
Homework
Make the Art as a windows app into a testing app.
