To calculate miles per gallon of a vehicle\'s fuel efficiency, one would divided

Question

To calculate miles per gallon of a vehicle's fuel efficiency, one would divided the total number of miles driven by the number of. Also, 1 mile = 1.61 kilometers. 1 gallon = 3.79 liters Write the program to calculate the miles per the gallon using which the user inputs. Also, convert the result into the kilometers per liter. Include the necessary declarations and main method to run your class. What is the purpose/significance of the following statement: public static void main statement is: Also explain what each component is and its purpose in the what public: static:

Explanation / Answer

#pragma argsused

#pragma hdrstop

#include<iomanip>

#include<iostream>

#include<conio>

using namespace std;

int main(int argc, char* argv[])

{

   // declare the variables

   double gallons;      // read in the gallons

   double miles;        // read in the miles

   double totalGallons; // calculate the total gallon input

   double totalMiles;   // calculate the total mile input

   double total;        // calculate the gallons/miles

   double average;      // calculate the average overall

   double counter;

   // initialization phase

   total = 0;       // initialise total

   counter = 1;     // initialise loop counter

   cout << "Enter the gallons used( -1 to end): " << endl;

   cin >> gallons;

   cout << "Enter the miles driven: " << endl;

   cin >> miles;

   average = miles / gallons; // calculate the the current input

   cout << average;   // display average

   // loop until sentinal value read from user

   while ( gallons != -1 ) {

      total = totalMiles + totalGallons;//add total of gallons to total of miles

      counter = counter + 1; // increment the counter

      // prompt for input and read the next gallons

      cout << "Enter the gallons user( -1 to end): " << endl;

      cout << "Enter the miles driven: " << endl;

   }

   // termination phase

   // if user entered at least one gallon...

   if ( counter != 0 ) {

      // calculate average of all gallons over miles entered

      average = static_cast< double >( total ) / counter;

      // display overall average with six digits of precision

      cout << "Overall average is " << setprecision( 6 )

           << fixed << average << endl;

      }

      else

         cout << "No gallons or miles were entered" << endl;

   getch();

   return 0;

}

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