microsoft/qdk
Publicmirrored from https://github.com/microsoft/qdkAvailable
katas/content/random_numbers/random_number/Solution.qs
27lines · modecode
| 1 | namespace Kata { |
| 2 | open Microsoft.Quantum.Math; |
| 3 | open Microsoft.Quantum.Measurement; |
| 4 | |
| 5 | operation RandomNumberInRange(min : Int, max : Int) : Int { |
| 6 | let nBits = BitSizeI(max - min); |
| 7 | mutable output = 0; |
| 8 | repeat { |
| 9 | set output = RandomNBits(nBits); |
| 10 | } until output <= max - min; |
| 11 | return output + min; |
| 12 | } |
| 13 | |
| 14 | operation RandomNBits(N : Int) : Int { |
| 15 | mutable result = 0; |
| 16 | for i in 0 .. N - 1 { |
| 17 | set result = result * 2 + RandomBit(); |
| 18 | } |
| 19 | return result; |
| 20 | } |
| 21 | |
| 22 | operation RandomBit() : Int { |
| 23 | use q = Qubit(); |
| 24 | H(q); |
| 25 | return MResetZ(q) == Zero ? 0 | 1; |
| 26 | } |
| 27 | } |
| 28 | |