Question

Programing in Scala: Create a class called “Array” that implements a fixed-sized two-dimensional array of floating-point numbers. Write separate methods to get an element (given parameters row and col), set an element (given parameters row, col, and value), and output the matrix to the console formatted properly in rows and columns. Next, provide an immutable method to perform array addition given two same-sized array.

Answer 1

I have taken the liberty to create and initialize 2 arrays of dimensions 2x2 in the class because I inferred from the question that the arrays must be initialized by the programmer within the class itself. If you want arrays to have user-defined rows, columns, and elements, do comment!

Array is a keyword in scala. So it will throw errors if we use it as a class name. So our class is called Arrayx.

Nm 1. class Arrayx{ var array1 = Array.ofDim[Float](2,2) // We Create our multidimensional array var array2 = Array.ofDim[Float] (2,2) array1 = Array(Array(1,2), Array(3,4)) // We initialise our multidimensional array array2 = Array(Array(5,6), Array (7,8)) var array3 = Array.ofDim[Float] (2,2) def displayArray ( { print("2D ARRAY is: ") println() for(i<- 0 to 1) // Traversing elements using loop for(j<- 0 to 1) print(array(1) () + " ") printin def getElement(a: Int, b: Int){ print("Element at [" + a + "[" + b + "]" + "is: ") print(array1(a) (b)) //print the element at i row and j coloumn println() def setElement(a: Int, b: Int, value: Int){ array1(a) (b) = value // set the element at i row and j coloumn to user defined value print("New 2D ARRAY is: ") println( displayArray ( ) def sumOfArrays() { for(i<- 0 to 1) for(j<- 0 to 1) array(i)()) = array1(i) ()+array2(i)() //addition of i and j element of both rows print("The sum of arrays is:") println() for(i<- 0 to 1) for(j<- 0 to 1) print(array(i) () + " ") println() 57 - object Mainobject{ def main(args: Array[String]){ var a = new Arrayx() a.displayArray ( ) a.getElement(1,1) a.setElement(1,1, 22) a. sumOfArrays()

CPU Time: 17.84 sec(s), Memory: 182880 kilobyte(s) executed in 10.039 sec(s) 2D ARRAY is: 1.0 2.0 3.0 4.0 Element at [1][1] is: 4.0 New 2D ARRAY is: 2D ARRAY is: 1.0 2.0 3.0 22.0 The sum of arrays is: 6.0 8.0 10.0 30.0 warning: there were 7 deprecation warnings (since 2.13.0); re-run with -deprecation for details

class Arrayx{
var array1 = Array.ofDim[Float](2,2) // We Create our multidimensional array
var array2 = Array.ofDim[Float](2,2)
array1 = Array(Array(1,2), Array(3,4)) // We initialise our multidimensional array
array2 = Array(Array(5,6), Array(7,8))
var array3 = Array.ofDim[Float](2,2)
  
def displayArray(){
print("2D ARRAY is: ")
println()
for(i<- 0 to 1)
{ // Traversing elements using loop
for(j<- 0 to 1)
{
print(array1(i)(j) + " ")
}
println()
}
}
  
def getElement(a:Int, b:Int){
print("Element at [" + a + "][" + b + "] " + "is: ")
print(array1(a)(b)) //print the element at i row and j coloumn
println()
  
}
def setElement(a:Int, b:Int, value:Int){
array1(a)(b) = value //set the element at i row and j coloumn to user defined value
print("New 2D ARRAY is: ")
println()
displayArray()
  
}
  
def sumOfArrays(){
for(i<- 0 to 1)
{
for(j<- 0 to 1)
{
array3(i)(j) = array1(i)(j)+array2(i)(j) //addition of i and j element of both rows
}
}
print("The sum of arrays is:")
println()
for(i<- 0 to 1)
{   
for(j<- 0 to 1)
{
print(array3(i)(j) + " ")
}
println()
}
}
  
}
  
object MainObject{
def main(args:Array[String]){
var a = new Arrayx()
a.displayArray()
a.getElement(1,1)
a.setElement(1,1, 22)
a.sumOfArrays()
}
}