| // RUN: %target-run-simple-swift | %FileCheck %s |
| // REQUIRES: executable_test |
| |
| // From http://rosettacode.org/wiki/Factorial |
| func factorial(_ x: Int) -> Int { |
| if (x == 0) { return 1 } |
| return x * factorial(x-1) |
| } |
| |
| // From http://rosettacode.org/wiki/Towers_of_Hanoi |
| func TowersOfHanoi(_ ndisks: Int, from: Int, to: Int, via: Int) -> Void { |
| if (ndisks == 1) { |
| print("Move disk from pole \(from) to pole \(to)\n", terminator: "") |
| } |
| else { |
| TowersOfHanoi(ndisks-1, from: from, to: via, via: to); |
| TowersOfHanoi(1, from: from, to: to, via: via); |
| TowersOfHanoi(ndisks-1, from: via, to: to, via: from); |
| } |
| } |
| |
| // Driver code. |
| print("Factorial of 10 = \(factorial(10))\n\n", terminator: "") |
| print("Towers of Hanoi, 4 disks\n", terminator: "") |
| TowersOfHanoi(4, from: 1, to: 2, via: 3) |
| |
| // CHECK: Factorial of 10 = 3628800 |
| // CHECK: Towers of Hanoi, 4 disks |
| // CHECK-NEXT: Move disk from pole 1 to pole 3 |
| // CHECK-NEXT: Move disk from pole 1 to pole 2 |
| // CHECK-NEXT: Move disk from pole 3 to pole 2 |
| // CHECK-NEXT: Move disk from pole 1 to pole 3 |
| // CHECK-NEXT: Move disk from pole 2 to pole 1 |
| // CHECK-NEXT: Move disk from pole 2 to pole 3 |
| // CHECK-NEXT: Move disk from pole 1 to pole 3 |
| // CHECK-NEXT: Move disk from pole 1 to pole 2 |
| // CHECK-NEXT: Move disk from pole 3 to pole 2 |
| // CHECK-NEXT: Move disk from pole 3 to pole 1 |
| // CHECK-NEXT: Move disk from pole 2 to pole 1 |
| // CHECK-NEXT: Move disk from pole 3 to pole 2 |
| // CHECK-NEXT: Move disk from pole 1 to pole 3 |
| // CHECK-NEXT: Move disk from pole 1 to pole 2 |
| // CHECK-NEXT: Move disk from pole 3 to pole 2 |
