- 시험 점수를 받아서 해당 점수의 등급을 반환해 주는 함수
// 시험 점수를 받아서 해당 점수의 등급을 반환해 주는 함수
func returnGradeforScore(inputScore: Int) -> String {
var grade: String = ""
switch inputScore {
case 95...100: grade = "A+"
case 90..<95: grade = "A"
case 85..<90: grade = "B+"
case 80..<85: grade = "B"
case 75...80: grade = "C+"
case 70..<75: grade = "C"
case 65..<70: grade = "D+"
case 60..<65: grade = "D"
case 0...60: grade = "F"
default:
grade = "There is out of range, re-input, please"
}
return grade
}
returnGradeforScore(inputScore: 97)
returnGradeforScore(inputScore: 78)
returnGradeforScore(inputScore: 204)- Grade 받아서 Point로 변환해 주는 함수
// Point = 4.5 4.0 3.5 3.0...
func returnToPointOfGrade(input grade: String) -> Double{
var point: Double = 0.0
switch grade {
case "A+":
point = 4.5
case "A":
point = 4.0
case "B+":
point = 3.5
case "B":
point = 3.0
case "C+":
point = 2.5
case "C":
point = 2.0
case "D+":
point = 1.5
case "D":
point = 1.0
case "F":
point = 0.0
default:
point = 0.0
}
return point
}
returnToPointOfGrade(input: "A+")- 함수 만들기 실습!
func volume(height: Double, horizontal: Double = 0, vertical: Double = 0, radian: Double = 0)-> Double {
var volume: Double = 0
let tupleValue = (height, horizontal, vertical, radian)
switch tupleValue {
case (let h, let ho, 0, 0):
volume = h * ho * ho
case (let h, let ho, let vertical, 0):
volume = h * ho * vertical
case (let h, 0, 0, let radi):
volume = 3.141592 * radi * radi * h
default:
volume = 0
}
return volume
}
volume(height: 10, horizontal: 10)- 월을 입력받아 해당월의 이름을 반환해주는 함수
(ex: 1 >>> "Jan", 12 >>> "Dec", 13 >> "Error")
func monthFromNumber(of month: Int) -> String {
let inputMonth: Int = month
var monthName: String
switch inputMonth {
case 1: monthName = "Jan"
case 2: monthName = "Feb"
case 3: monthName = "Mar"
case 4: monthName = "Apr"
case 5: monthName = "May"
case 6: monthName = "Jun"
case 7: monthName = "Jul"
case 8: monthName = "Aug"
case 9: monthName = "Sep"
case 10: monthName = "Oct"
case 11: monthName = "Nov"
case 12: monthName = "Dec"
default:
monthName = "Error"
}
return monthName
}
monthFromNumber(of: 3)
monthFromNumber(of: 14)- 년/월을 입력받아 해당 마지막 날을 반환 해주는 함수(윤년 고려)
func returnLastDay(Year year: Int,Month month: Int) -> Int {
let inputYear: Int = year
let inputMonth: Int = month
let isLeapYear: Bool
let lastDay: Int
isLeapYear = leapYearCalc(of: inputYear) // 윤년 계산
if isLeapYear == true && month == 2 {
lastDay = 29
} else {
switch inputMonth {
case 1:
lastDay = 31
case 2:
lastDay = 28
case 3, 5, 7, 8, 10, 12:
lastDay = 31
case 4, 6, 9, 11:
lastDay = 30
default:
lastDay = 0
}
}
return lastDay
}
func leapYearCalc(of year: Int) -> Bool {
let inputYear: Int = year
let isLeapYear: Bool
if inputYear % 4 == 0 && inputYear % 100 != 0 || inputYear % 400 == 0 {
isLeapYear = true
} else {
isLeapYear = false
}
return isLeapYear
}
// 함수 실행 및 Test
returnLastDay(Year: 2000, Month: 2)
returnLastDay(Year: 2018, Month: 1)
returnLastDay(Year: 2018, Month: 4)
returnLastDay(Year: 2018, Month: 2)- 시험점수를 입력받아 대학교grade로 나눠서 반환해주는 함수
(ex:95 >>> "A+" /// 80 >>> "B")
func gradeFromScore(of score: Int) -> String {6
let inputScore: Int = score
var grade: String
switch inputScore {
case 95 ... 100: grade = "A+"
case 90 ..< 95: grade = "A0"
case 85 ..< 90: grade = "B+"
case 80 ..< 85: grade = "B0"
case 75 ..< 80: grade = "C+"
case 70 ..< 75: grade = "C0"
case 65 ..< 70: grade = "D+"
case 60 ..< 65: grade = "D0"
case 0 ..< 60: grade = "F"
default: grade = "Error"
}
return grade
}
// 시험점수 함수 Test
gradeFromScore(of: 97)
gradeFromScore(of: 82)
gradeFromScore(of: 400)
gradeFromScore(of: -70)- 도형 부피 구하기 함수
let PI: Double = 3.141592 // PI, 원주율
func volume(width: Double, length: Double = 0, height: Double = 0, radian: Double = 0) -> Double {
let compareData = (width, length, height, radian)
var volume: Double = 0.0
switch compareData {
case (let width, 0, 0, 0):
volume = width * width * width
case (let width, let length, let height, 0):
volume = width * length * height
case (0, 0, let height, let radian):
volume = PI * radian * radian * height
case (0, 0, 0, let radian):
volume = PI * radian * radian * radian * 4 / 3
case (0, 0, let height, let radian):
volume = PI * radian * radian * height / 3
default:
volume = 0
}
return volume
}
volume(width: 10, length: 10)
volume(width: 3, length: 40, height: 20)
volume(width: 10, length: 0, height: 20, radian: 10)- 도형 넓이 구하기 함수
func calculatedArea(length: Double, width: Double , radian: Double) -> Double {
let area: Double
let compareData = (length, width, radian)
switch compareData {
case (let length, let width , 0):
area = length * width
case (let length, 0, 0):
area = length * length
case (0, 0, let radian):
area = 3.14 * radian * radian
default:
area = 0
}
return area
}
func area(width: Double, height: Double, radian: Double) -> Double {
let compareData = (width, height, radian)
var area: Double = 0.0
switch compareData {
case (let length, 0, 0):
area = length * length
case (let width, let height, 0):
area = width * height
case (0, 0, let radian):
area = 3.14 * radian * radian
default:
area = 0
}
return area
}
area(width: 4, height: 0, radian: 0)
area(width: 3, height: 4, radian: 0)
area(width: 0, height: 3, radian: 0)
area(width: 0, height: 0, radian: 5)