Calendar: Difference between revisions
Added Swift solution
(Added Swift solution) |
|||
Line 7,545:
27 28 29 30 31 24 25 26 27 28 29 30 29 30 31
</pre>
=={{header|Swift}}==
<lang swift>let monthDays = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
let monthNames = ["January", "February", "March", "April", "May", "June", "July",
"August", "September", "October", "November", "December"]
let monthWidth = 20
let monthGap = 2
let dayNames = "Su Mo Tu We Th Fr Sa"
// Gauss's algorithm for calculating the day of the week for 1 Jan
func firstDayOfYear(year: Int) -> Int {
let c = year / 100
let y = year % 100 - 1
return (1 + 5 * (y % 4) + 3 * y + 5 * (c % 4)) % 7
}
func isLeapYear(year: Int) -> Bool {
return (year % 100 == 0) ? year % 400 == 0 : year % 4 == 0
}
func firstDayOfMonth(year: Int, month: Int) -> Int {
var day = firstDayOfYear(year: year)
for m in 1..<month {
day += monthDays[m - 1]
if m == 2 && isLeapYear(year: year) {
day += 1
}
}
return day % 7
}
func daysInMonth(year: Int, month: Int) -> Int {
var days = monthDays[month - 1]
if isLeapYear(year: year) && month == 2 {
days += 1
}
return days
}
func rpad(string: String, width: Int) -> String {
return string.count >= width ? string
: String(repeating: " ", count: width - string.count) + string
}
func lpad(string: String, width: Int) -> String {
return string.count >= width ? string
: string + String(repeating: " ", count: width - string.count)
}
func centre(string: String, width: Int) -> String {
if string.count >= width {
return string
}
let c = (width - string.count)/2
return String(repeating: " ", count: c) + string
+ String(repeating: " ", count: width - string.count - c)
}
func formatMonth(year: Int, month: Int) -> [String] {
var lines: [String] = []
let firstDay = firstDayOfMonth(year: year, month: month)
lines.append(centre(string: monthNames[month - 1], width: monthWidth))
lines.append(dayNames)
var padWidth = 2
var line = String(repeating: " ", count: 3 * firstDay)
for day in 1...daysInMonth(year: year, month: month) {
line += rpad(string: String(day), width: padWidth)
padWidth = 3
if (firstDay + day) % 7 == 0 {
lines.append(line)
line = ""
padWidth = 2
}
}
if line.count > 0 {
lines.append(lpad(string: line, width: monthWidth))
}
return lines
}
func printCentred(string: String, width: Int) {
print(rpad(string: string, width: (width + string.count)/2))
}
public func printCalendar(year: Int, width: Int) {
let months = min(12, max(1, (width + monthGap)/(monthWidth + monthGap)))
let lineWidth = monthWidth * months + monthGap * (months - 1)
printCentred(string: "[Snoopy]", width: lineWidth)
printCentred(string: String(year), width: lineWidth)
var firstMonth = 1
while firstMonth <= 12 {
if firstMonth > 1 {
print()
}
let lastMonth = min(12, firstMonth + months - 1)
let monthCount = lastMonth - firstMonth + 1
var lines: [[String]] = []
var lineCount = 0
for month in firstMonth...lastMonth {
let monthLines = formatMonth(year: year, month: month)
lineCount = max(lineCount, monthLines.count)
lines.append(monthLines)
}
for i in 0..<lineCount {
var line = ""
for month in 0..<monthCount {
if month > 0 {
line.append(String(repeating: " ", count: monthGap))
}
line.append(i < lines[month].count ? lines[month][i]
: String(repeating: " ", count: monthWidth))
}
print(line)
}
firstMonth = lastMonth + 1
}
}
printCalendar(year: 1969, width: 80)</lang>
{{out}}
<pre>
[Snoopy]
1969
January February March
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 2 3 4 1 1
5 6 7 8 9 10 11 2 3 4 5 6 7 8 2 3 4 5 6 7 8
12 13 14 15 16 17 18 9 10 11 12 13 14 15 9 10 11 12 13 14 15
19 20 21 22 23 24 25 16 17 18 19 20 21 22 16 17 18 19 20 21 22
26 27 28 29 30 31 23 24 25 26 27 28 23 24 25 26 27 28 29
30 31
April May June
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 2 3 4 5 1 2 3 1 2 3 4 5 6 7
6 7 8 9 10 11 12 4 5 6 7 8 9 10 8 9 10 11 12 13 14
13 14 15 16 17 18 19 11 12 13 14 15 16 17 15 16 17 18 19 20 21
20 21 22 23 24 25 26 18 19 20 21 22 23 24 22 23 24 25 26 27 28
27 28 29 30 25 26 27 28 29 30 31 29 30
July August September
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 2 3 4 5 1 2 1 2 3 4 5 6
6 7 8 9 10 11 12 3 4 5 6 7 8 9 7 8 9 10 11 12 13
13 14 15 16 17 18 19 10 11 12 13 14 15 16 14 15 16 17 18 19 20
20 21 22 23 24 25 26 17 18 19 20 21 22 23 21 22 23 24 25 26 27
27 28 29 30 31 24 25 26 27 28 29 30 28 29 30
31
October November December
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
1 2 3 4 1 1 2 3 4 5 6
5 6 7 8 9 10 11 2 3 4 5 6 7 8 7 8 9 10 11 12 13
12 13 14 15 16 17 18 9 10 11 12 13 14 15 14 15 16 17 18 19 20
19 20 21 22 23 24 25 16 17 18 19 20 21 22 21 22 23 24 25 26 27
26 27 28 29 30 31 23 24 25 26 27 28 29 28 29 30 31
30
</pre>
| |||