0.5 First Day Assignment

Overview

For this assignment we will focus on instantiating an object and assigning that object's fields. You will
also notice that instructions have been reduced for this assignment. As you go on in this degree
assignment instructions will dwindle and it will be up to you to solve problems yourself.

Copy over your First Day 0.4 Assignment.
A. Change the folder name to 0.5 B. Change the .sln file to 0.5 Go to top
Instantiate a Laptop.

The student has a Book in their Backpack but we also want them to put a laptop in their bag.
A. Under the line of code that instantiates the Student's Book, copy and paste the code below.
Resource
- 0.5.1 How to Instantiate Objects in C#
```
this.Student.Backpack.Laptop = new Laptop();
```
Instantiate Laptop
B. Set a breakpoint on the line of code that instantiates the Laptop.

Set Breakpoint
C. Run the application. Click the 'Fill Backpack' button. You will get a NullReferenceException
because a Student does not exist when you try to instantiate something that belongs to the

Student (the Backpack).
Resource
- 0.5.2 How to Diagnose a Null Reference Exception
Null Student
D. Click the Restart button on the top menu. Click 'New Student', 'Have Breakfast' and 'Fill
Backback'.

Restart Button
E. In the Autos Window, check the Laptop object. Note that the Laptop field is null because line 86
has not yet executed.
Resource
- 0.5.3 How to Debug Objects
Laptop in Autos
F. Press F10 to step over the line of code that instantiates the Laptop. Now the Autos Window
shows the Laptop Value as being {FirstDayScenario.Laptop}, which indicates an object.

Laptop Object
G. Stop the application. Go to top
Give the laptop fields values and calculate the total weight of the backpack.
A. Under the lines of code that assign values to the Book, assign values to the Laptop object using
dot notation.
1. The Laptop's Manufacturer is "Lenovo". 2. The Laptop's Weight is 2.5 B. Under the lines of code that assign the Laptop's values, assign the Backpack's Weight to the sum of
Book's Weight and the Laptop's Weight.
```
this.Student.Backpack.Weight = this.Student.Backpack.Book.Weight + this.Studen
```
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C.

Under the lines of code that assign the Text, paste the code below.
```
this.textOutput.Text += "\n\nThe student's laptop in their backpack: ";
```
```
this.textOutput.Text += "\nManufacturer: " + this.Student.Backpack.Laptop.Manu
this.textOutput.Text += "\nWeight: " + this.Student.Backpack.Laptop.Weight;
```
```
this.textOutput.Text += "\nTotal Backpack Weight: " + this.Student.Backpack.We
```


Text Output
D. Run the application. Click the 'New Student', 'Have Breakfast' and 'Fill Backpack' buttons. The
application should look like the image below.

Application End
Go to top
Submit to the Feedback System and submit the URL to Canvas.
Go to top

0.5 First Day Assignment

Overview

Copy over your First Day 0.4 Assignment.

Instantiate a Laptop.

Give the laptop fields values and calculate the total weight of the backpack.

Submit to the Feedback System and submit the URL to Canvas.