(Gas Mileage) Drivers are concerned with the mileage obtained by their automobiles. One driver has kept track of several tankfuls of gasoline by recording miles driven and gallons used for each tankful. Develop a C++ program that uses a while statement to input the miles driven and gallons used for each tankful. The program should calculate and display the miles per gallon obtained for each tankful and print the combined miles per gallon obtained for all tankfuls up to this point.
Enter miles driven (-1 to quit): 287
Enter gallons used: 13
MPG this tankful: 22.076923
Total MPG: 22.076923
Enter miles driven (-1 to quit): 200
Enter gallons used: 10
MPG this tankful: 20.000000
Total MPG: 21.173913
Enter miles driven (-1 to quit): 120
Enter gallons used: 5
MPG this tankful: 24.000000
Total MPG: 21.678571
Enter miles driven (-1 to quit): -1