Answer
code
Work Step by Step
# 6.22 (Display current date and time) Listing 2.7, ShowCurrentTime.py, displays the
# current time. Enhance this program to display the current date and time. (Hint: The
# calendar example in Listing 6.13, PrintCalendar.py, should give you some ideas on
# how to find the year, month, and day.)
import time
def main():
currentTime = time.time() # Get current time
# Obtain the total seconds since midnight, Jan 1, 1970
totalSeconds = int(currentTime)
# Get the current second
currentSecond = totalSeconds % 60
# Obtain the total minutes
totalMinutes = totalSeconds // 60
# Compute the current minute in the hour
currentMinute = totalMinutes % 60
# Obtain the total hours
totalHours = totalMinutes // 60
# Compute the current hour
currentHour = totalHours % 24
# Compute the total days
totalDays = totalHours // 24
if currentHour > 0:
totalDays += 1
# Obtain Year
currentYear = 2000
while getTotalDaysInYears(currentYear) < totalDays:
currentYear += 1
# Obtain Month
totalNumOfDaysInTheYear = totalDays - getTotalDaysInYears(currentYear - 1)
currentMonth = 0
while getTotalDaysInMonths(currentYear, currentMonth) < totalNumOfDaysInTheYear:
currentMonth += 1
# Obtain Day
currentDay = totalNumOfDaysInTheYear - getTotalDaysInMonths(currentYear, currentMonth - 1)
# Display results
output = "Current date and time is " + \
str(currentMonth) + "/" + str(currentDay) + "/" + str(currentYear) + " " + \
str(currentHour) + ":" + str(currentMinute) + ":" + str(currentSecond) + " GMT"
print(output)
# Get the total number of days from Jan 1, 1970 to the specified year
def getTotalDaysInYears(year):
total = 0
# Get the total days from 1970 to the specified year
for i in range(1970, year + 1):
if isLeapYear(i):
total = total + 366
else:
total = total + 365
return total
# Get the total number of days from Jan 1 to the month in the year*
def getTotalDaysInMonths(year, month):
total = 0
# Add days from Jan to the month
for i in range(1, month + 1):
total = total + getNumberOfDaysInMonth(year, i)
return total
# Get the number of days in a month
def getNumberOfDaysInMonth(year, month):
if month == 1 or month == 3 or month == 5 or month == 7 or \
month == 8 or month == 10 or month == 12:
return 31
if month == 4 or month == 6 or month == 9 or month == 11:
return 30
if month == 2:
return 29 if isLeapYear(year) else 28
return 0 # If month is incorrect
# Determine if it is a leap year
def isLeapYear(year):
return year % 400 == 0 or (year % 4 == 0 and year % 100 != 0)
main()
