Computer Application in Industrial Engineering: Programming C# for Engineers

1. DR ATIF SHAHZAD
Computer Applications
in Industrial Engg.-I
IE-322
LECTURE #08

2. Computer Applications in
Industrial Engg.-I
IE322

3. …Recap
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4. What we will see…
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A Random Review
A quick Question
Classes
• Class vs Object:
Examples
• Class vs Object:
Adding a Class to a C#
project
Declaring a Class
Adding a Method to the
Class
Instantiating an object
of a class
Calling a Method of an
object
Complete Example—
class Car
Solution Explorer
Files of the project in
Windows explorer
Example2:
Some built-in classes
A BonusTopic
• Look this example
• Conditional Operator
What is aVisual Studio
Project?
What is aVisual Studio
Solution?
Project & Solution

5. A Random Review
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5
Data types are sets
(ranges) of values that
have similar
characteristics.

6. A Random Review
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DataTypes DefaultValue MinimumValue MaximumValue
sbyte 0 -128 127
byte 0 0 255
short 0 -32768 32767
ushort 0 0 65535
int 0 -2147483648 2147483647
uint 0u 0 4294967295
long 0L -9223372036854775808 9223372036854775807
ulong 0u 0 18446744073709551615
float 0.0f ±1.5×10-45 ±3.4×1038
double 0.0d ±5.0×10-324 ±1.7×10308
decimal 0.0m ±1.0×10-28 ±7.9×1028
bool false Two possible values: true and false
char 'u0000' 'u0000' 'uffff'
object null - -
string null - -

7. A Random Review: Integer types
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// Declare some variables
byte centuries = 20;
ushort years = 2000;
uint days = 730480;
ulong hours = 17531520;
// Print the result on the console
Console.WriteLine(centuries + " centuries are " + years +
" years, or " + days + " days, or " + hours + " hours.
");
// Console output:
// 20 centuries are 2000 years, or 730480 days, or 17531520
// hours.
ulong maxIntValue = UInt64.MaxValue;
Console.WriteLine(maxIntValue); // 18446744073709551615

8. A Random Review: Real types
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// Declare some variables
float floatPI = 3.141592653589793238f;
double doublePI = 3.141592653589793238;
// Print the results on the console
Console.WriteLine("Float PI is: " + floatPI);
Console.WriteLine("Double PI is: " + doublePI);
// Console output:
// Float PI is: 3.141593
// Double PI is: 3.14159265358979

9. A quick Question
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int age = 8;
if ( !(age >= 16) )
{
Console.Write("Your age is less than 16");
}
//What is the OUTPUT?

10. A quick Question
int age = 8;
if ( !(age >= 16) ) {
Console.Write("Your age is less than 16");
}
// Outputs "Your age is less than 16"
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11. Classes
IE322

12. Classes
Classes act as templatesfrom which
an instance of an object is created at run time.
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13. Classes
Classes act as templates
from which
an instance of an object is created
at run time.
Classes define the properties of the object
and the methods used to control the
object's behavior.
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14. Class vs Object: Example 1
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Drawing of House
House

15. Class vs Object: Example 2
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Engineering Drawing of a car
Car

16. Class vs Object: Example 3
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BankAccountclass
Bank Account of a customer

17. Class vs Object: Example 4
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Student class
A particular student

18. Class vs Object:You examples?
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Class:
Object:
Attributes:
Methods:

19. Class vs Object:
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Class:
Object:
Attributes or States or Properties
these are the characteristics of the object which define it in a
way and describe it in general or in a specific moment
Methods or Behaviors
these are the specific distinctive actions, which can be done by
the object.
Methods:

20. Adding a Class to a C# project
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21. Declaring a Class
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Let us create a class named as Car
namespace CarApp
{
class Car
{
}
}

22. Declaring a Class
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Let us create a class named as Car
namespace CarApp
{
class Car
{
} // end class Car
}//end namespace CarApp

23. Adding a Method to the Class
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namespace CarApp
{
class Car
{
public void Start()
{ // A method
Console.WriteLine("Car has been
started");
}
} // end class Car
}//end namespace CarApp

24. Instantiating an object of a class
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In the Main method of the Program:
Car MyCar = new Car();

25. Calling a Method of an object
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Access or dot (.) operator
MyCar.Start();

26. Complete Example—class Car
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27. Complete Example—class Program
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28. Solution Explorer
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29. Files of the project inWindows
explorer
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30. Example2:
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public class Cat
{
// Field name
private string name;
// Field color
private string color;
public string Name
{
// Getter of the property "Name"
get
{
return this.name;
}
// Setter of the property "Name"
set
{
this.name = value;
}
}
public string Color
{
// Getter of the property "Color"
get
{
return this.color;
}
// Setter of the property "Color"
set
{
this.color = value;
}
}
// Default constructor
public Cat()
{
this.name = "Unnamed";
this.color = "gray";
}
// Constructor with parameters
public Cat(string name, string color)
{
this.name = name;
this.color = color;
}
// Method SayMiau
public void SayMiau()
{
Console.WriteLine("Cat {0} said: Miauuuuuu!", name);
}
}
public class Cat
{
// Field name
private string name;
// Field color
private string color;
public string Name
{
// Getter of the property "Name"
get
{
return this.name;
}
// Setter of the property "Name"
set
{
this.name = value;
}
}
public string Color
{
// Getter of the property "Color"
get
{
return this.color;
}
// Setter of the property "Color"
set
{
this.color = value;
}
}
// Default constructor
public Cat()
{
this.name = "Unnamed";
this.color = "gray";
}
// Constructor with parameters
public Cat(string name, string color)
{
this.name = name;
this.color = color;
}
// Method SayMiau
public void SayMiau()
{
Console.WriteLine("Cat {0} said: Miauuuuuu!
", name);
}
}

31. Some built-in classes
System.Console
System.String (string in C#)
System.Int32 (int in C#)
System.Array
System.Math
System.Random
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32. A BonusTopic
IE322

33. A BonusTopic
Conditional Operator
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34. Look at this example
int age = 42;
string msg;
if(age >= 18)
msg = "Welcome";
else
msg = "Sorry";
Console.WriteLine(msg);
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35. Conditional Operator
int age = 42;
string msg;
msg = (age >= 18) ? "Welcome" :
"Sorry";
Console.WriteLine(msg);
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36. Conditional Operator
What is the value of x after this code?
int x = 5;
int y = 3;
x = (x > y) ? y : x;
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37. Annex-
A Quick random revision
IE322

38. What is aVisual Studio Project?
When you create an
app, website, plug-in,
etc. inVisual Studio,
you start with a project.
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39. What is aVisual Studio Project?
When you create an app, website, plug-in, etc.
inVisual Studio, you start with a project.
In a logical sense, a project contains all the
source code files, icons, images, data files, etc.
that are compiled into an executable, library, or
website.
A project also contains compiler settings and
other configuration files that might be needed
by various services or components that your
program communicates with.9/27/2018
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40. What is aVisual Studio Project?
A project is defined in an XML file with an
extension such as .vbproj, .csproj, or
.vcxproj.
This file contains a virtual folder hierarchy,
and paths to all the items in the project. It
also contains the build settings.
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41. What is aVisual Studio Project?
In Visual Studio, the project file is used by
Solution Explorer to display the project
contents and settings.
When you compile your project, the
MSBuild engine consumes the project file
to create the executable.You can also
customize projects to produce other kinds
of output.
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42. What is aVisual Studio Solution?
A project is contained within a solution. A
solution contains one or more related projects,
along with build information, Visual Studio
window settings, and any miscellaneous files
that aren't associated with a particular project.
A solution is described by a text file (extension
.sln) with its own unique format; it is generally
not intended to be edited by hand.
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43. What is aVisual Studio Solution?
A solution has an associated .suo file that stores
settings, preferences and configuration
information for each user that has worked on
the project.
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44. Project & Solution
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46. 9/27/2018
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NEVER hesitate to
contact should you
have any question
Dr.Atif Shahzad