swift_lab02

/**

                            Online Swift Compiler.
                Code, Compile, Run and Debug Swift script online.
Write your code in this editor and press "Run" button to execute it.

*/

func
howOld ()->
  String
{
  let currentYear = 2022;

  print ("Podaj rok swojego urodzenia: ")
let birthDateString:String! = readLine ();
  let yourAge:Int? = currentYear - Int (birthDateString)!;

  return "Masz \(yourAge!) lat.";
}

func
circleProps ()
{
  print ("Podaj promien kola: ");

  let pi = 3.14;
  let radius:String! = readLine ();
  let circumference:Double = 2 * pi * Double (radius)!;
  let field = pi * Double (radius)! * Double (radius)!;

print( " Promien kola: \(radius!)\n", "Obwod kola: \(circumference)\n",
    "Pole kola: \(field)")
}

func cuboid() -> String {

    print("Podaj dlugosc boku szescianu: ");

    let cubeSide: String! = readLine();
    let cubeSideFloat: Float = Float(cubeSide)!;
    let volume: Float = cubeSideFloat * cubeSideFloat * cubeSideFloat;
    let totalArea: Float = cubeSideFloat * cubeSideFloat * 6;

    return "Szescian ma objetosc \(volume) oraz pole calkowite \(totalArea)";
}

func boardPrice() -> Float {

    print("Podaj dlugosc pokoju: ");
    let a: String! = readLine();
    print("Podaj szerokosc pokoju: ");
    let b: String! = readLine();
    print("Podaj dlugosc korytarza: ");
    let z: String! = readLine();
    print("Podaj szerokosc drzwi: ");
    let s: String! = readLine()
    print("Podaj cene listwy: ");
    let boardMeterPrice: String! = readLine();

    let boardLength: Float = Float(a)! * 2 + Float(b)! * 3 + Float(z)! * 2 - Float(s)!;
    let boardPrice = Float(boardMeterPrice)! * boardLength;

    return boardPrice;
}

func aritAvg() -> Float {

    let aritAvg = (Float.random(in: 1...9) + Float.random(in: 1...9) + Float.random(in: 1...9)) / 3;
    return aritAvg;
}

func weigAvg() -> Float {

    print("Podaj ocene: ");
    let gr1: String! = readLine();
    print("Podaj jej wage: ");
    let gr1w: String! = readLine();
    print("Podaj ocene: ");
    let gr2: String! = readLine();
    print("Podaj jej wage: ");
    let gr2w: String! = readLine();
    print("Podaj ocene: ");
    let gr3: String! = readLine();
    print("Podaj jej wage: ");
    let gr3w: String! = readLine();

    let result = (Float(gr1)! * Float(gr1w)! + Float(gr2)! * Float(gr2w)! +
                  Float(gr3)! * Float(gr3w)!) / (Float(gr1w)! + Float(gr2w)! +
                  Float(gr3w)!);

    return result;
}

print(weigAvg());