Difference between revisions of "Intro Week 6"

Revision as of 18:28, 25 January 2016

Review Arrays

Review Generic Lists

 1 List<int> scores = new List<int>();  //A list of ints 
 2 
 3 List<string> names = new List<string>(); //A list of strings
 4 
 5 //add some ints to the scores list
 6 scores.Add(100);
 7 scores.Add(7);
 8 
 9 //Add some names to the names list
10 names.Add("Jeff");
11 names.Add("Uncle Eddie");
12 
13 foreach(string name in names)
14 {
15    Console.WriteLine(name);
16 }

Simple arrays and multidimensional arrays

OOP Arrays

Struct

Structures -struct are composed of several pieces of data that can be of different types.

1 struct student
2 {
3 public int oasis id;
4 public string name;
5 public double GPA;
6 }

1 struct player
2 {
3 public int playerID;
4 public string playerName;
5 public difficulty playerLevel;
6 }

In class demo coins
Quarter class
*Mint
*Year

Coin class
*Mint
*Year
*Value

Functions/Methods

Function help with code reuse. If your going to use it more than once make it into a funtions. syntax simple

[access-modifier] return type indentifier ( [parateters] )
{
    //some code
}

access-modifiers
public : mean that this method can be called from anywhere else in the program
Static

static means that

Defining

1 public static string Hello ()
2 {
3     return "Hello ";
4 }
5 
6 public static string HelloToName (string Name)
7 {
8     return "Hello " + Name;
9 }

Calling a finction in c#

1 string firstHello, jeffHello;   //declare some strings
2 firstHello = Hello();   //call the function Hello
3 jeffHello = HelloToName("Jeff");   //call the function HelloToName

Console Example /infod/jeff/classSource/class3/function.cs - source

Hello World!
Hello
Hello Jeff
Hello Marge

C:\User\csharp>

function.cs

Home work

Sweet card program http://iam.colum.edu/introtoprogramming/Jeff/SP10/ConsoleApplicationStructs.zip have it for super freeeee as in free beer

Write a csharp program that uses a coin struct to make a coin collection

start with

12 quarters

22 dimes

5 nickels

and 174 pennies.

After you have made the coin collection (Array or List). Write a method that can calculate the value of the collection.

Bonus write a csharp program that can make correct change given an amount of money.

ie type in 1.08 and it will give back a coin collection of

4 quarters

1 nickel

3 pennies