daysOfLife.go

package main

import (
  "fmt"
  "time"
)

func main() {
  var day, month, year, totalOfDays int

  fmt.Scanln(&day)
  fmt.Scanln(&month)
  fmt.Scanln(&year)

  for i := year + 1; i < time.Now().Year(); i++ {
    totalOfDays+= daysOfYear(i)
  }

  totalOfDays += dayUntilEndOfYear(day, month, year)
  totalOfDays += nthDayOnYear(time.Now().Day(), int(time.Now().Month()), time.Now().Year())

  fmt.Println(totalOfDays)
}

func daysOfYear(year int) int{
  if isLeapYear(year) {
    return 366
  } else {
    return 365
  }
}

func nthDayOnYear(day, month, year int) int{
  var totalOfDays int

  for i:=0; i < month-1; i++ {
    totalOfDays += daysQuantityByMonth(i+1, year)
  }

  return totalOfDays + day
}

func dayUntilEndOfYear(day, month, year int) int {
  var totalOfDays int

  for i:=month + 1; i < 13; i++ {
    totalOfDays += daysQuantityByMonth(i, year)
  }

  totalOfDays += daysQuantityByMonth(month, year) - day

  return totalOfDays
}

func daysQuantityByMonth(month, year int) int{
  if month == 2 && isLeapYear(year) {
    return 29
  }

  var months [12]int

  months[0] = 31
  months[1] = 28
  months[2] = 31
  months[3] = 30
  months[4] = 31
  months[5] = 30
  months[6] = 31
  months[7] = 31
  months[8] = 30
  months[9] = 31
  months[10] = 30
  months[11] = 31

  return months[month - 1]
}

func isLeapYear(year int) bool {
  return year % 4 == 0
}