Difference between revisions of "Intro Week 6"

Revision as of 00:14, 3 March 2010

Review Arrays

Review Generic Lists

<csharp> List<int> scores = new List<int>(); //A list of ints

List<string> names = new List<string>(); //A list of strings

//add some ints to the scores list scores.Add(100); scores.Add(7);

//Add some names to the names list names.Add("Jeff"); names.Add("Uncle Eddie");

foreach(string name in names) {

  Console.WriteLine(name);

}

</csharp>

Simple arrays and multidimensional arrays

OOP Arrays

Struct

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

<csharp> struct student { public int oasis id; public string name; public double GPA; } </csharp> <csharp> struct player { public int playerID; public string playerName; public difficulty playerLevel; } </csharp>

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

<csharp>public static string Hello () {

   return "Hello ";

}

public static string HelloToName (string Name) {

   return "Hello " + Name;

}</csharp>

Calling a finction in c#

<csharp>string firstHello, jeffHello; //declare some strings firstHello = Hello(); //call the function Hello jeffHello = HelloToName("Jeff"); //call the function HelloToName </csharp>

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