pointer demo

test.swift

import Foundation

func t() {
    let a: [Int32] = [1,2,3,4,5]
    let n = Int32(a.count)
    Swift.print("Swift: a = \(a)")
    let ptr = UnsafeMutablePointer<Int32>(a)
    f1(ptr, n)
    f2(ptr, n)
    f1(ptr, n)
    Swift.print("Swift: a = \(a)")
    let b: [Double] = [0, 0, 0, 0, 0]
    let ptr2 = UnsafeMutablePointer<Double>(b)
    f3(ptr,ptr2,n)
    Swift.print("Swift b: ", terminator: "")
    for v in b {
        print(String(format: "%.3f", v), terminator: " ")
    }
}