import scala.util.Random
/*
This program generates random lottery numbers for:
- 6 distinct numbers out of 37
- 1 distinct number out of 7 (power number)
It uses:
- scala.util.Random for random number generation
- Random.shuffle for efficient unique selection
- clean functions and idiomatic Scala style
*/
/*
pickDistinctNumbers(count, max):
Returns `count` distinct random numbers from the range 1..max.
Algorithm:
- Build a List of all numbers 1..max
- Shuffle the list using Random.shuffle
- Take the first `count` numbers
This guarantees:
- all numbers are unique
- uniform randomness
- no duplicate checks needed
*/
def pickDistinctNumbers(count: Int, max: Int): List[Int] = {
val numbers = (1 to max).toList
Random.shuffle(numbers).take(count)
}
/*
pickPowerNumber(max):
Returns a single random number in the range 1..max.
*/
def pickPowerNumber(max: Int): Int = {
Random.nextInt(max) + 1
}
@main def LotteryGenerator(): Unit = {
val mainCount = 6
val mainMax = 37
val powerMax = 7
// Generate main numbers (distinct)
val mainNumbers = pickDistinctNumbers(mainCount, mainMax).sorted
// Generate power number
val powerNumber = pickPowerNumber(powerMax)
// Output results
println(s"Main numbers (6 out of 37): ${mainNumbers.mkString(" ")}")
println(s"Power number (1 out of 7): $powerNumber")
}
/*
run:
Main numbers (6 out of 37): 6 15 21 24 26 37
Power number (1 out of 7): 5
*/
