Create a two-dimensional array at runtime: Difference between revisions
Create a two-dimensional array at runtime (view source)
Revision as of 10:57, 21 July 2020
, 3 years agoAdded Wren
PatGarrett (talk | contribs) (→{{header|ALGOL 60}}: Section added) |
(Added Wren) |
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echo array[rows - 1][cols - 1]
unlet array</lang>
=={{header|Wren}}==
<lang ecmascript>import "io" for Stdin, Stdout
var x
var y
System.print("Enter the dimensions of the array:")
while (true) {
System.write(" First dimension : ")
Stdout.flush()
x = Num.fromString(Stdin.readLine())
if (x && (x is Num) && (x.isInteger) && (x > 0) ) {
System.write(" Second dimension : ")
Stdout.flush()
y = Num.fromString(Stdin.readLine())
if (y && (y is Num) && (y.isInteger) && (y > 0) ) break
System.print("Dimension must be a positive integer.")
} else {
System.print("Dimension must be a positive integer.")
}
}
// create the 2d array
var a = List.filled(x, [0] * y)
// write an element
a[x - 1][y - 1] = 42
// print it
System.print("\na[%(x-1)][%(y-1)] = %(a[x-1][y-1])")
// make the array eligible for garbage collection
a = null</lang>
{{out}}
Example session:
<pre>
Enter the dimensions of the array:
First dimension : 3
Second dimension : 4
a[2][3] = 42
</pre>
=={{header|XPL0}}==
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