Question

C+

Create an application named CarDemo that declares at least two Car objects and demonstrates how they can be incremented using an overloaded ++ operator.

Create a Car class that contains the following properties:

• Model - The car model (as a string)
• Mpg The car's miles per gallon (as a double)

Include two overloaded constructors. One accepts parameters for the model and miles per gallon; the other accepts a model and sets the miles per gallon to 20.

Overload a ++ operator that increases the miles per gallon value by 1. The CarDemo application creates at least one Car using each constructor and displays the Car values both before and after incrementation.

using static System.Console;
class CarDemo
{
static void Main()
{
// Write your main here.
}
public static void Display(string message, Car s)
{
// Write your Display() method here.
}

}   

Answer 1

//---------- Car.cs --------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CarDemoApplication
{
class Car
{
private string model;
private double mpg;

public Car(string model, double mpg)
{
this.model = model;
this.mpg = mpg;
}
public Car(string model)
{
this.model = model;
this.mpg = 20;
}
  
public string Model
{
get
{
return model;
}

set
{
model = value;
}
}

public double Mpg
{
get
{
return mpg;
}

set
{
mpg = value;
}
}

public static Car operator ++(Car car)
{
car.Mpg++;
return car;
}

override
public string ToString()
{
return String.Format("{0:-20} : {1,-20:}\n{2:-20} : {3,-20:}", "Model",this.model,"MPG", this.mpg);
}
}
}

//--------------- CarDemo.cs -------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CarDemoApplication
{
class CarDemo
{
static void Main(string[] args)
{
Car one = new Car("Suzuki");
Car two = new Car("BMW", 100);

Display("Car One Before Increment:", one);
one++;
Display("Car One After Increment:", one);

Display("Car Two Before Increment:", two);
two++;
Display("Car Two After Increment:", two);

Console.WriteLine("\nEnter any key to continue");
Console.ReadKey();
}
public static void Display(string message, Car s)
{
Console.WriteLine("\n" + message+"\n");
Console.WriteLine("" + s);
}
}
}