Xcode part15

[0519 名称未設定 2019/11/02(土) 00:49:42.10 ID:OBF0j2uN0]

struct A {
var A1: Double
var A2: Double
}

struct B {
var B1: Double
var B2: A
}

let C = A(A1: 999.9, A2: 9999.9)
let D = B(B1: 10.0, B2: C)