if graderna.text == ""{
}
else{
var myInt: Int? = Int(graderna.text!) // conversion of string to Int
var myInt2: Int? = Int(radien.text!)
let pi = 3.1415926
let lutning = 360
let result = (Double(myInt! / lutning) * Double(pi))
svar2.text = "\(result)"
}
我正在尝试制作一个具有不同方程式和公式的数学应用程序,但是我试图圈出一个扇形,但是我只想尝试将输入值除以360,但是当我这样做时,它只会显示0,除非...
let myInt = Int(graderna.text!)
let myInt2 = Int(radien.text!)
if let realInt = myInt, realInt2 = myInt2 {
let pi = 3.1415926
let lutning = 360.0
let result = Double (realInt) * (pi / lutning)
svar2.text = "\(result)"
}
行中,将类型强制转换为let result = (Double(myInt! / lutning) * Double(pi))
after