Scala calculator that accepts three string parameters
How to write a method called calculator that accepts three string parameters:
def calculator(operand1: String, operator: String, operand2: String): Unit
Converts the operands to Int;
Performs the desired mathematical operator (+, -, *, or /) on the two operands
Prints the result, or a generic error messages
scala functional-programming
edited Nov 19 '18 at 17:20
Amit Prasad
575315
add a comment |
How to write a method called calculator that accepts three string parameters:
def calculator(operand1: String, operator: String, operand2: String): Unit
Converts the operands to Int;
Performs the desired mathematical operator (+, -, *, or /) on the two operands
Prints the result, or a generic error messages
scala functional-programming
edited Nov 19 '18 at 17:20
Amit Prasad
575315
2
Welcome to StackOverflow. This site rewards effort. What have you tried so far? Show us code that didn't work so we can better address your understanding of the Scala language.
– jwvh
Nov 19 '18 at 7:37
add a comment |
How to write a method called calculator that accepts three string parameters:
def calculator(operand1: String, operator: String, operand2: String): Unit
Converts the operands to Int;
Performs the desired mathematical operator (+, -, *, or /) on the two operands
Prints the result, or a generic error messages
scala functional-programming
edited Nov 19 '18 at 17:20
Amit Prasad
575315
How to write a method called calculator that accepts three string parameters:
def calculator(operand1: String, operator: String, operand2: String): Unit
Converts the operands to Int;
Performs the desired mathematical operator (+, -, *, or /) on the two operands
Prints the result, or a generic error messages
scala functional-programming
scala functional-programming
edited Nov 19 '18 at 17:20
Amit Prasad
575315
edited Nov 19 '18 at 17:20
Amit Prasad
575315
edited Nov 19 '18 at 17:20
Amit Prasad
575315
edited Nov 19 '18 at 17:20
Amit Prasad
575315
edited Nov 19 '18 at 17:20
Amit Prasad
575315
575315
asked Nov 19 '18 at 7:20
user10673283
2
Welcome to StackOverflow. This site rewards effort. What have you tried so far? Show us code that didn't work so we can better address your understanding of the Scala language.
– jwvh
Nov 19 '18 at 7:37
add a comment |
2
Welcome to StackOverflow. This site rewards effort. What have you tried so far? Show us code that didn't work so we can better address your understanding of the Scala language.
– jwvh
Nov 19 '18 at 7:37
2
2
Welcome to StackOverflow. This site rewards effort. What have you tried so far? Show us code that didn't work so we can better address your understanding of the Scala language.
– jwvh
Nov 19 '18 at 7:37
Welcome to StackOverflow. This site rewards effort. What have you tried so far? Show us code that didn't work so we can better address your understanding of the Scala language.
– jwvh
Nov 19 '18 at 7:37
add a comment |
1 Answer
1
active
oldest
votes
Your question shows that you put little to no effort into finding the solution yourself.
When asking a question on StackOverflow next time, ask a question about existing code (e.g. "Why am I getting this exception?" or "Why doesn't my code compile?") and don't assume some internet code monkey will magically write your code.
Anyways, as you seem to be a new member of SO, def calculator would look something like this:
import scala.collection.immutable.StringOps._
import scala.util.{Try, Success, Failure}
def calculator(left: String, op: String, right: String): Unit = {
def parse(value: String) = Try(value.toDouble)
(parse(left), parse(right)) match {
case (Success(leftDouble), Success(rightDouble)) => {
op match {
case "/" => println(leftDouble / rightDouble)
case "*" => println(leftDouble * rightDouble)
case "+" => println(leftDouble + rightDouble)
case "-" => println(leftDouble - rightDouble)
case invalid: String => println(s"Invalid operator $invalid.")
}
}
case (Failure(e), _) => println(s"Could not parse $left.")
case(_, Failure(e)) => println(s"Could not parse $right.")
case(Failure(e1), Failure(e2)) => println(s"Could not parse $left and $right.")
}
}
Try it out!
If you need any explanation don't hesitate to drop a comment.
I hope this helps.
answered Nov 19 '18 at 12:47
Markus AppelMarkus Appel
745220
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Your question shows that you put little to no effort into finding the solution yourself.
When asking a question on StackOverflow next time, ask a question about existing code (e.g. "Why am I getting this exception?" or "Why doesn't my code compile?") and don't assume some internet code monkey will magically write your code.
Anyways, as you seem to be a new member of SO, def calculator would look something like this:
import scala.collection.immutable.StringOps._
import scala.util.{Try, Success, Failure}
def calculator(left: String, op: String, right: String): Unit = {
def parse(value: String) = Try(value.toDouble)
(parse(left), parse(right)) match {
case (Success(leftDouble), Success(rightDouble)) => {
op match {
case "/" => println(leftDouble / rightDouble)
case "*" => println(leftDouble * rightDouble)
case "+" => println(leftDouble + rightDouble)
case "-" => println(leftDouble - rightDouble)
case invalid: String => println(s"Invalid operator $invalid.")
}
}
case (Failure(e), _) => println(s"Could not parse $left.")
case(_, Failure(e)) => println(s"Could not parse $right.")
case(Failure(e1), Failure(e2)) => println(s"Could not parse $left and $right.")
}
}
Try it out!
If you need any explanation don't hesitate to drop a comment.
I hope this helps.
answered Nov 19 '18 at 12:47
Markus AppelMarkus Appel
745220
add a comment |
Your question shows that you put little to no effort into finding the solution yourself.
When asking a question on StackOverflow next time, ask a question about existing code (e.g. "Why am I getting this exception?" or "Why doesn't my code compile?") and don't assume some internet code monkey will magically write your code.
Anyways, as you seem to be a new member of SO, def calculator would look something like this:
import scala.collection.immutable.StringOps._
import scala.util.{Try, Success, Failure}
def calculator(left: String, op: String, right: String): Unit = {
def parse(value: String) = Try(value.toDouble)
(parse(left), parse(right)) match {
case (Success(leftDouble), Success(rightDouble)) => {
op match {
case "/" => println(leftDouble / rightDouble)
case "*" => println(leftDouble * rightDouble)
case "+" => println(leftDouble + rightDouble)
case "-" => println(leftDouble - rightDouble)
case invalid: String => println(s"Invalid operator $invalid.")
}
}
case (Failure(e), _) => println(s"Could not parse $left.")
case(_, Failure(e)) => println(s"Could not parse $right.")
case(Failure(e1), Failure(e2)) => println(s"Could not parse $left and $right.")
}
}
Try it out!
If you need any explanation don't hesitate to drop a comment.
I hope this helps.
answered Nov 19 '18 at 12:47
Markus AppelMarkus Appel
745220
add a comment |
Your question shows that you put little to no effort into finding the solution yourself.
When asking a question on StackOverflow next time, ask a question about existing code (e.g. "Why am I getting this exception?" or "Why doesn't my code compile?") and don't assume some internet code monkey will magically write your code.
Anyways, as you seem to be a new member of SO, def calculator would look something like this:
import scala.collection.immutable.StringOps._
import scala.util.{Try, Success, Failure}
def calculator(left: String, op: String, right: String): Unit = {
def parse(value: String) = Try(value.toDouble)
(parse(left), parse(right)) match {
case (Success(leftDouble), Success(rightDouble)) => {
op match {
case "/" => println(leftDouble / rightDouble)
case "*" => println(leftDouble * rightDouble)
case "+" => println(leftDouble + rightDouble)
case "-" => println(leftDouble - rightDouble)
case invalid: String => println(s"Invalid operator $invalid.")
}
}
case (Failure(e), _) => println(s"Could not parse $left.")
case(_, Failure(e)) => println(s"Could not parse $right.")
case(Failure(e1), Failure(e2)) => println(s"Could not parse $left and $right.")
}
}
Try it out!
If you need any explanation don't hesitate to drop a comment.
I hope this helps.
answered Nov 19 '18 at 12:47
Markus AppelMarkus Appel
745220
Your question shows that you put little to no effort into finding the solution yourself.
When asking a question on StackOverflow next time, ask a question about existing code (e.g. "Why am I getting this exception?" or "Why doesn't my code compile?") and don't assume some internet code monkey will magically write your code.
Anyways, as you seem to be a new member of SO, def calculator would look something like this:
import scala.collection.immutable.StringOps._
import scala.util.{Try, Success, Failure}
def calculator(left: String, op: String, right: String): Unit = {
def parse(value: String) = Try(value.toDouble)
(parse(left), parse(right)) match {
case (Success(leftDouble), Success(rightDouble)) => {
op match {
case "/" => println(leftDouble / rightDouble)
case "*" => println(leftDouble * rightDouble)
case "+" => println(leftDouble + rightDouble)
case "-" => println(leftDouble - rightDouble)
case invalid: String => println(s"Invalid operator $invalid.")
}
}
case (Failure(e), _) => println(s"Could not parse $left.")
case(_, Failure(e)) => println(s"Could not parse $right.")
case(Failure(e1), Failure(e2)) => println(s"Could not parse $left and $right.")
}
}
Try it out!
If you need any explanation don't hesitate to drop a comment.
I hope this helps.
answered Nov 19 '18 at 12:47
Markus AppelMarkus Appel
745220
answered Nov 19 '18 at 12:47
Markus AppelMarkus Appel
745220
answered Nov 19 '18 at 12:47
Markus AppelMarkus Appel
745220
answered Nov 19 '18 at 12:47
Markus AppelMarkus Appel
745220
745220
add a comment |
add a comment |
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2
Welcome to StackOverflow. This site rewards effort. What have you tried so far? Show us code that didn't work so we can better address your understanding of the Scala language.
– jwvh
Nov 19 '18 at 7:37