Question

Ive done this part but i want to know how i can change the file so it accepts inputs and a file input PLEASE HELP PYTHON

Write a program that computes the fuel efficiency of a multi-leg journey. The program will first prompt for the starting odometer reading and then get information about a series of legs. For each leg, the user enters the current odometer reading and the amount of gas used (separated by a space). The user signals the end of the trip with a blank line. The program should print out the miles per gallon achieved on each leg and the total MPG for the trip.

Answer 1

def main():
# introduce program
print('This program computes the fuel efficiency of a multi-leg journey.\n')

# get the starting odometer reading
odoStart = int(input('What is the starting odometer reading? '))

# initialize total miles and total fuel consumed to zero
milesTtl = 0; fuelTtl = 0

# get the next odometer reading and fuel consumption, separated by a space
odoFuel = input('\nEnter the odometer reading and fuel consumption for this leg of the trip, separated by a space: ')

# loop while entered text is not empty
while odoFuel != '' and len(odoFuel.split()) == 2:
# split entered text into odometer reading and fuel consumption
strList = odoFuel.split()
odoNext = int(strList[0])
fuelNext = int(strList[1])

# print mpg for this leg (current - (start + total miles)) / fuel consumed
print('Fuel efficiency for this leg: {:.1f}'.format((odoNext - (odoStart + milesTtl)) / fuelNext))

# update total miles with current odometer reading - starting reading
milesTtl = odoNext - odoStart

# update total fuel consumed
fuelTtl += fuelNext

# get the next odometer reading and fuel consumption, separated by a space
odoFuel = input('\nEnter the odometer reading and fuel consumption for this leg of the trip, separated by a space: ')

# print mpg for entire trip (total miles / total fuel)
if fuelTtl > 0:
print('\nFuel efficiency for entire trip: {:.1f}\n'.format(milesTtl / fuelTtl))
else:
print('\nInsufficient data was entered.')

if __name__ == '__main__':
main()

save this main file in .py format and run it will prompt for input

Algorithm (pseudocode)
# introduce program
# get the starting odometer reading
# initialize total miles and total fuel consumed to zero
# get the next odometer reading and fuel consumption, separated by a space
# loop while entered text is not empty
# split entered text into odometer reading and fuel consumption
# print mpg for this leg (current - (start + total miles)) / fuel consumed
# update total miles with current odometer reading - starting reading
# update total fuel consumed
# get the next odometer reading and fuel consumption, separated by a space
# print mpg for entire trip (total miles / total fuel)