#!/usr/bin/env python3
	

import time


# Display the program's instructions.
print('Press ENTER to begin. Afterwards, press ENTER to "click" the stopwatch. Press Ctrl-C to quit.')
input()                    # press Enter to begin
print('Started.')
startTime = time.time()    # get the first lap's start time
lastTime = startTime
lapNum = 1

try:
    while True:
         input()
         lapTime = round(time.time() - lastTime, 2)
         totalTime = round(time.time() - startTime, 2)
         print('Lap #%s: %s (%s)' % (lapNum, totalTime, lapTime), end='')
         lapNum += 1
         lastTime = time.time() # reset the last lap time
except KeyboardInterrupt:
       # Handle the Ctrl-C exception to keep its error message from displaying.
       print('\nDone.')
