C++, visual studio, code should work 100%

A liter is 0.264179 gallons. Write a program that will read in the number o liters of gasoline consumed by the user's car and the number of miles traveled by the car and will then output the number of miles per galion the car delivered. Your program should allow the user to repeat this caleulation as often as the user wishes. Define a function to compute the number of miles per gallon. Your program should use a globally defined constant for the number of liters per gallon