Difference between revisions of "Multidimensional arrays"

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{{Multidimensional arrays}}
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{{TYNavigator|1-dimensional_arrays|Records}}
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5D - Multidimensional Arrays (author: Tao Yue, state: unchanged)
 
5D - Multidimensional Arrays (author: Tao Yue, state: unchanged)
  
 
You can have arrays in multiple dimensions:
 
You can have arrays in multiple dimensions:
<font color="#006699"><strong>type</strong></font>
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    datatype <font color="#000000"><strong>=</strong></font> <font color="#006699"><strong>array</strong></font> <font color="#000000"><strong>[</strong></font>enum_type1<font color="#000000"><strong>,</strong></font> enum_type2<font color="#000000"><strong>]</strong></font> <font color="#006699"><strong>of</strong></font> datatype<font color="#000000"><strong>;</strong></font>
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<syntaxhighlight lang=pascal>
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type
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  datatype = array [enum_type1, enum_type2] of datatype;
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</syntaxhighlight>
  
 
The comma separates the dimensions, and referring to the array would be done with:
 
The comma separates the dimensions, and referring to the array would be done with:
a <font color="#000000"><strong>[</strong></font><font color="#ff0000">5</font><font color="#000000"><strong>,</strong></font> <font color="#ff0000">3</font><font color="#000000"><strong>]</strong></font>
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<syntaxhighlight lang=pascal>
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a [5, 3]
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</syntaxhighlight>
  
 
Two-dimensional arrays are useful for programming board games. A tic tac toe board could have these type and variable declarations:
 
Two-dimensional arrays are useful for programming board games. A tic tac toe board could have these type and variable declarations:
<font color="#006699"><strong>type</strong></font>
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  StatusType <font color="#000000"><strong>=</strong></font> <font color="#000000"><strong>(</strong></font>X<font color="#000000"><strong>,</strong></font> O<font color="#000000"><strong>,</strong></font> Blank<font color="#000000"><strong>)</strong></font><font color="#000000"><strong>;</strong></font>
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<syntaxhighlight lang=pascal>
  BoardType <font color="#000000"><strong>=</strong></font> <font color="#006699"><strong>array</strong></font><font color="#000000"><strong>[</strong></font><font color="#ff0000">1</font><font color="#000000"><strong>.</strong></font><font color="#000000"><strong>.</strong></font><font color="#ff0000">3</font><font color="#000000"><strong>,</strong></font><font color="#ff0000">1</font><font color="#000000"><strong>.</strong></font><font color="#000000"><strong>.</strong></font><font color="#ff0000">3</font><font color="#000000"><strong>]</strong></font> <font color="#006699"><strong>of</strong></font> StatusType<font color="#000000"><strong>;</strong></font>
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type
<font color="#006699"><strong>var</strong></font>
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  StatusType = (X, O, Blank);
    Board <font color="#000000"><strong>:</strong></font> BoardType<font color="#000000"><strong>;</strong></font>
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  BoardType = array[1..3,1..3] of StatusType;
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var
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  Board : BoardType;
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</syntaxhighlight>
  
 
You could initialize the board with:
 
You could initialize the board with:
<font color="#006699"><strong>for</strong></font> count1 <font color="#000000"><strong>:=</strong></font> <font color="#ff0000">1</font> <font color="#006699"><strong>to</strong></font> <font color="#ff0000">3</font> <font color="#006699"><strong>do</strong></font>
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  <font color="#006699"><strong>for</strong></font> count2 <font color="#000000"><strong>:=</strong></font> <font color="#ff0000">1</font> <font color="#006699"><strong>to</strong></font> <font color="#ff0000">3</font> <font color="#006699"><strong>do</strong></font>
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<syntaxhighlight lang=pascal>
    Board<font color="#000000"><strong>[</strong></font>count1<font color="#000000"><strong>,</strong></font> count2<font color="#000000"><strong>]</strong></font> <font color="#000000"><strong>:=</strong></font> Blank<font color="#000000"><strong>;</strong></font>
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for count1 := 1 to 3 do
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  for count2 := 1 to 3 do
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    Board[count1, count2] := Blank;
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</syntaxhighlight>
 
You can, of course, use three- or higher-dimensional arrays.
 
You can, of course, use three- or higher-dimensional arrays.
  
{|style=color-backgroud="white" cellspacing="20"
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{{TYNavigator|1-dimensional_arrays|Records}}
|[[1-dimensional_arrays|previous]] 
 
|[[Contents|contents]]
 
|[[Records|next]]
 
|}
 

Latest revision as of 01:18, 21 February 2020

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5D - Multidimensional Arrays (author: Tao Yue, state: unchanged)

You can have arrays in multiple dimensions:

type
  datatype = array [enum_type1, enum_type2] of datatype;

The comma separates the dimensions, and referring to the array would be done with:

a [5, 3]

Two-dimensional arrays are useful for programming board games. A tic tac toe board could have these type and variable declarations:

type
  StatusType = (X, O, Blank);
  BoardType = array[1..3,1..3] of StatusType;
var
  Board : BoardType;

You could initialize the board with:

for count1 := 1 to 3 do
  for count2 := 1 to 3 do
    Board[count1, count2] := Blank;

You can, of course, use three- or higher-dimensional arrays.

 ◄   ▲   ►