Can you help me complete

#include

#include

#include "mileage.h$"$

using namespace std;

int main$()$

$\{$

$//$Declare and initialize variables

double miles $=0\mathrm{.}0$;

double gallons $=0\mathrm{.}0$;

$//$Limit decimal display to two decimal places.

cout $$ fixed $$ setprecision$(2)$;

$//$Retrieve data from user and validate data entered.

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

cin $>>$ miles;

while $($miles

$\{$

cout $$ "Incorrect entry.

Enter a number"

greater than zero." $$ endl;

cin $>>$ miles;

$\}$

cout $$ "Enter the gallons used: $"$ endl;

cin $>>$ gallons;

while $($gallons

$\{$

cout $$ "Incorrect entry.

Enter a number"

greater than zero." $$ endl;

cin $>>$ gallons;

$\}$

$//$Create copy of mileage class

mileage myMiles$\{$ miles, gallons $\}$;

$//$Display results for user

cout $$ "Your car gets $"$ myMiles.getMPG$()$

miles$-$per$-$gallon." $$ endl;

$\}$#include "mileage.h$"$

mileage::mileage$($double miles, double gallons$)$

$\{$

setMiles$($miles$)$;

setGallons$($gallons$)$;

$\}$

void mileage::setMiles$($double miles$)$

$\{$

this$->$miles $=$ miles;

$\}$

void mileage::setGallons$($double gallons$)$

$\{$

this$->$gallons $=$ gallons;

$\}$

double mileage::getMiles$()$

$\{$

return miles;

$\}$

double mileage::getGallons$()$

$\{$

return gallons;

$\}$

double mileage::getMPG$()$

$\{$

$//$Do not directly access the private variables of the class.

$//$Use the get methods.

return getMiles$()/$ getGallons$()$;

$\}$

#pragma once

class mileage

$\{$

private:

double miles;

double gallons;

public:

mileage$($ double, double $)$;

void setMiles$($double$)$;

void setGallons$($double$)$;

double getMiles$()$;

double getGallons$()$;

double getMPG$()$;

$\}$;