Intro Week 5

Enum

More complex variable types but very useful ways of defining data.

enum

enumerations allow us to define data that can take a fixed set of results.

enum direction {north, east, south, west};

enum difficulty {novice =1, easy =5, normal =10, hard =15, unbeatable =25};

Or we can use months

//another more useful example
// forced sequence to start  
// from 1 instead of 0 (default)
enum Months 
  {
    January = 1, February , March, April ,
    May , June , July , August , Sept , Oct , Nov , Dec 
  }

To write out the name of month we can use the enumerator

Console.WriteLine(Months.February);
Console.WriteLine( (Months)3 );

Array

Groups of that same type of variable

A group of strings

string[] names; //delcare an array of strings
names = new string[4]; //initialize the array

//set the values in the array
names[0] = "Cheryl";
names[1] = "Joe";
names[2] = "Matt";
names[3] = "Robert";

for each

A for each loop requires and iterator.. more on this iterator thing later...

string[] names = {"Cheryl", "Joe", "Matt", "Robert"};
foreach (string person in names)
{
    Console.Write (" " + person);
}

produces

 Cheryl Joe Matt Robert

Homework

Write a program that averages 10 numbers