import Foundation
/*
This program generates random lottery numbers for:
- 6 distinct numbers out of 37
- 1 distinct number out of 7 (power number)
It uses:
- Swift's built‑in shuffled() for uniform random permutation
- Int.random(in:) for the single power number
- clean functions and idiomatic Swift style
*/
/*
pickDistinctNumbers(count:max:)
Returns `count` distinct random numbers from the range 1...max.
Algorithm:
- Build an array of all numbers 1...max
- Shuffle the array using shuffled()
- Take the first `count` numbers
This guarantees:
- all numbers are unique
- uniform randomness
- no duplicate checks needed
*/
func pickDistinctNumbers(count: Int, max: Int) -> [Int] {
Array(1...max)
.shuffled() // Fisher–Yates under the hood
.prefix(count)
.sorted()
}
/*
pickPowerNumber(max:)
Returns a single random number in the range 1...max.
*/
func pickPowerNumber(max: Int) -> Int {
Int.random(in: 1...max)
}
/*
Main program entry point
*/
let mainCount = 6
let mainMax = 37
let powerMax = 7
// Generate main numbers (distinct)
let mainNumbers = pickDistinctNumbers(count: mainCount, max: mainMax)
// Generate power number
let powerNumber = pickPowerNumber(max: powerMax)
// Output results
print("Main numbers (6 out of 37): \(mainNumbers.map(String.init).joined(separator: " "))")
print("Power number (1 out of 7): \(powerNumber)")
/*
run:
Main numbers (6 out of 37): 4 10 21 22 29 32
Power number (1 out of 7): 3
*/
