カレンダー作成

cal.swift

import Foundation

func printMonth(first fday:Int, days:Int){
    var d = 1 - fday
    func daystr()->String{
        if d <= 0{
            return "   "
        }else{
            return (d < 10 ? "  \(d)" : " \(d)")
        }
    }
    
    while d <= days{
        var line = ""
        for _ in 0..<7{
            line += daystr()
            d += 1
            if d > days{break}
            
        }
        print(line)
    }
}