Difference between revisions of "Intro Week 5"
esse quam videri
m (Text replacement - "</csharp>" to "</syntaxhighlight>") |
m (Text replacement - "syntaxhighlight lang="csharp" line="1" " to "syntaxhighlight lang="csharp"") |
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enum | enum | ||
:enumerations allow us to define data that can take a fixed set of results. | :enumerations allow us to define data that can take a fixed set of results. | ||
| − | <syntaxhighlight lang="csharp | + | <syntaxhighlight lang="csharp"> |
enum direction {north, east, south, west}; | enum direction {north, east, south, west}; | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | <syntaxhighlight lang="csharp | + | <syntaxhighlight lang="csharp"> |
enum difficulty {novice =1, easy =5, normal =10, hard =15, unbeatable =25}; | enum difficulty {novice =1, easy =5, normal =10, hard =15, unbeatable =25}; | ||
</syntaxhighlight> | </syntaxhighlight> | ||
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Or we can use months | Or we can use months | ||
| − | <syntaxhighlight lang="csharp | + | <syntaxhighlight lang="csharp">//another more useful example |
// forced sequence to start | // forced sequence to start | ||
// from 1 instead of 0 (default) | // from 1 instead of 0 (default) | ||
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To write out the name of month we can use the enumerator | To write out the name of month we can use the enumerator | ||
| − | <syntaxhighlight lang="csharp | + | <syntaxhighlight lang="csharp"> |
Console.WriteLine(Months.February); | Console.WriteLine(Months.February); | ||
Console.WriteLine( (Months)3 ); | Console.WriteLine( (Months)3 ); | ||
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A group of strings | A group of strings | ||
| − | <syntaxhighlight lang="csharp | + | <syntaxhighlight lang="csharp"> |
string[] names; //delcare an array of strings | string[] names; //delcare an array of strings | ||
names = new string[4]; //initialize the array | names = new string[4]; //initialize the array | ||
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A for each loop requires and iterator.. more on this iterator thing later... | A for each loop requires and iterator.. more on this iterator thing later... | ||
| − | <syntaxhighlight lang="csharp | + | <syntaxhighlight lang="csharp">string[] names = {"Cheryl", "Joe", "Matt", "Robert"}; |
foreach (string person in names) | foreach (string person in names) | ||
{ | { | ||
Latest revision as of 03:21, 9 February 2016
Contents
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 );
String Methods
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
