Vehicle Object Array - C# -

i'm having trouble writing code. i'm not sure , how write constructors , accessors.

the activity have this:

write 3 derived classes allow user enter details of 3 types of vehicles attributes.

• car (make, model, year, bodytype)

• airplane (make, model, year, noengines, enginetype)

• boat (make, model, year, length, hulltype)

the 4th class base class vehicle contains shared attributes , methods

make attributes either private (in derived classes) or protected (in base class) , write accessor methods each attribute.

write 2 constructors each derived class. 1 no arguments , other accepts values of attributes in derived class arguments.

write console application called fleet.cs creates , displays 2 of each vehicle type

my code far follows:

using system; using system.collections.generic; using system.linq; using system.text; using system.threading.tasks;  namespace consoleapplication5 {     class vehicle     {         static void main(string[] args)         {         }          class car         {             protected string make             {                                 {                     return make;                 }                 set                 {                     make = value;                 }             }              protected string model             {                                 {                     return model;                 }                 set                 {                     model = value;                 }             }              protected int year             {                                 {                     return year;                 }                 set                 {                     year = value;                 }             }              protected string bodytype             {                                 {                     return bodytype;                 }                 set                 {                     bodytype = value;                 }             }              public bool isinitialized;             public car()             {                 isinitialized = true;             }         }     }      class airplane     {         protected string make         {                         {                 return make;             }             set             {                 make = value;             }         }          protected string model         {                         {                 return model;             }             set             {                 model = value;             }         }          protected int year         {                         {                 return year;             }             set             {                 year = value;             }         }          protected int numengines         {                         {                 return numengines;             }             set             {                 numengines = value;             }         }          protected int enginetype         {                         {                 return enginetype;             }             set             {                 enginetype = value;             }         }     }      class boat     {         protected string make         {                         {                 return make;             }             set             {                 make = value;             }         }          protected string model         {                         {                 return model;             }             set             {                 model = value;             }         }          protected string year         {                         {                 return year;             }             set             {                 year = value;             }         }          protected string length         {                         {                 return length;             }             set             {                 length = value;             }         }          protected string hulltype         {                         {                 return hulltype;             }             set             {                 hulltype = value;             }         }     } } 

first part oop principles

classes:

a class construct enables create own custom types grouping variables of other types, methods , events. class blueprint. defines data , behavior of type. if class not declared static, client code can use creating objects or instances assigned variable. variable remains in memory until references go out of scope. @ time, clr marks eligible garbage collection. if class declared static, 1 copy exists in memory , client code can access through class itself, not instance variable. more information, see static classes , static class members (c# programming guide). unlike structs, classes support inheritance, fundamental characteristic of object-oriented programming. more information, see inheritance (c# programming guide).

also objects instances of classes.

inheritance:

inheritance, encapsulation , polymorphism, 1 of 3 primary characteristics (or pillars) of object-oriented programming. inheritance enables create new classes reuse, extend, , modify behavior defined in other classes. class members inherited called base class, , class inherits members called derived class. derived class can have 1 direct base class. however, inheritance transitive. if classc derived classb, , classb derived classa, classc inherits members declared in classb , classa.

derived class:
class created based on existing class (i.e., base class). derived class inherits of member variables , methods of base class derived. called derived type.

method:

a method (or message) in object-oriented programming (oop) procedure associated object class. object made of behavior , data. data represented properties of object , behavior methods. methods interface object presents outside world. example window object have methods such open , close. 1 of important capabilities method provides method overriding. same name (e.g., area) can used multiple different kinds of classes. allows sending objects invoke behaviors , delegate implementation of behaviors receiving object. example object can send area message object , appropriate formula invoked whether receiving object rectangle,circle, triangle, etc.

attributes , properties:

"fields", "class variables", , "attributes" more-or-less same - low-level storage slot attached object. each language's documentation might use different term consistently, actual programmers use them interchangeably. (however, means of terms can ambiguous, "class variable" - can interpreted "a variable of instance of given class", or "a variable of class object itself" in language class objects can manipulate directly.)

"properties" are, in languages use, else entirely - they're way attach custom behaviour reading / writing field. (or replace it.)

so if want categorize them oop(object oriented programming) principles.

second part:

write console application called fleet.cs creates , displays 2 of each vehicle type.

so 1 way of doing creating vehicles hardcoded. other way ask user vehicle details console.readline(). main method this.

static void main(string[] args) {     vehicle v1 = new vehicle { make = "test1", model = "model1", year = 1996 };     vehicle v2 = new vehicle { make = "test2", model = "model2", year = 1997 };     console.writeline(v1);     console.writeline(v2);     ... } 

and override tostring() method each class. this:

public override string tostring() {     return string.format("vehicle {0} , of model {1} , made in {2}.", make, model, year); } 

here can use base.tostring() data of upper (base) class in derivided class.

edit 1: user input:

so if want user input make program this:

static void main(string[] args) {     //input     vehicle v1 = new vehicle();     console.write("enter make of 1st vehicle: ");     v1.make = console.readline();     console.write("enter model of 1st vehicle: ");     v1.model = console.readline();     console.writeline("enter year of manufacturing 1st vehicle:");     v1.year = int.parse(console.readline());     //output     console.writeline("the data 1st vehicle: ");     console.writeline(v1);     ... } 

even better create input method in class , calling main program. code not repeating itself.

finished program

vehicle.cs

using system;  class vehicle {     string make, model;     int year;      public string make { { return make; } set { make = value; } }     public string model { { return model; } set { model = value; } }     public int year { { return year; } set { year = value; } }      public vehicle()     {         make = model = "unknown";         year = 0;     }      public vehicle(string make, string model, int year)     {         this.make = make;         this.model = model;         this.year = year;     }      public virtual void getfrominput()     {         console.write("enter make of vehicle: ");         make = console.readline();         console.write("enter model of vehicle: ");         model = console.readline();         console.writeline("enter year of manufacturing vehicle: ");         year = int.parse(console.readline());     }      public override string tostring()     {         return string.format("vehicle {0} , of model {1} , made in {2}.", make, model, year);     } } 

car.cs

using system;  class car : vehicle {     string bodytype;     public string bodytype { { return bodytype; } set { bodytype = value; } }      public car() : base()     {         bodytype = "unknown";     }      public car(string make, string model, int year, string bodytype) : base(make, model, year)     {         this.bodytype = bodytype;     }      public override void getfrominput()     {         base.getfrominput();         console.write("enter body type car: ");         bodytype = console.readline();     }      public override string tostring()     {         return base.tostring() + string.format("this vehicle car body type of {0}.", bodytype);     } } 

airplane.cs

using system;  class airplane : vehicle {     int noengines;     string enginetype;     public int numberofengines{ { return noengines; } set { noengines = value; } }     public string enginetype { { return enginetype; } set { enginetype = value; } }      public airplane() : base()     {         noengines = 0;         enginetype = "unknown";     }      public airplane(string make, string model, int year, int noengines, string enginetype) : base(make, model, year)     {         this.noengines = noengines;         this.enginetype = enginetype;     }      public override void getfrominput()     {         base.getfrominput();         console.write("enter number of engines on airplane: ");         numberofengines = int.parse(console.readline());         console.write("enter engine type airplane: ");         enginetype = console.readline();     }      public override string tostring()     {         return base.tostring() + string.format("this vehicle airplane {0} engines , engine type of {1}.", numberofengines, enginetype);     } } 

boat.cs

using system;  class boat : vehicle {     int length;     string hulltype;     public int length { { return length; } set { length = value; } }     public string hulltype { { return hulltype; } set { hulltype = value; } }      public boat() : base()     {         length = 0;         hulltype = "unknown";     }      public boat(string make, string model, int year, int length, string hulltype) : base(make, model, year)     {         this.length = length;         this.hulltype = hulltype;     }      public override void getfrominput()     {         base.getfrominput();         console.write("enter length of boat: ");         length = int.parse(console.readline());         console.write("enter hull type boat: ");         hulltype = console.readline();     }      public override string tostring()     {         return base.tostring() + string.format("this vehicle boat length of {0} , hull type of {1}.", length, hulltype);     } } 

fleet.cs

using system;  class fleet {     static void main(string[] args)     {         vehicle v1 = new vehicle();         v1.getfrominput();         console.writeline(v1);         //... other vehicles     } }