CODEWITHSUNDEEP
c#inheritanceconstructor
user118380
user118380

Reputation:

easiest way to make a class inherit constructors (C#)

Yeah, sorry about asking a stupid n00b question. So I have a C# program. I have a class

class foo
{

    public int bar, wee, someotherint, someyetanotherint;

    public foo()
    {
         this.bar = 1:
         this.wee = 12;
         this.someotherint = 1231;
         this.someyetanotherint = 443;
    }
}

And I want to make a class called spleen that inherits from foo

class spleen : foo
{

}

What is the quickest, easiest syntax to make the class spleen inherit the constructor from foo without having to copy/paste the entire constructor from foo? I don't want to hear that I already have too many parameters. I already know that. (edit: Actually, no. I'm an idiot) I know I should probably somehow call the parent constructor, but I don't know how. How do I do that.

Edit: I realize now that I should have taken more time to write my question. It looks like I was trying to ask two questions at the same time without realizing it (how to inherit constructors with no parameters, and how to inherit constructors with parameters) , and somehow jumbled it all up. However the answers provided were very helpful and solved my problem. Thanks, and sorry for being such an idiot!

Upvotes: 7

Views: 15463

Answers (4)

JaredPar
JaredPar

Reputation: 754655

What you're looking for is the base keyword. You can use it to call into the base constructor and provide the necessary arguments.

Try the following. I picked 0 as a default for lack of a better option 

class spleen : foo { 
  public spleen() : base(0,0,0,0)
  {
  }
}

EDIT

Based on your new version of the code, the simplest way to call the constructor is to quite literally do nothing. The default constructor generated for spleen will automatically call the base empty constructor of foo. 

class spleen : foo { 
  public spleen() {}
}

Upvotes: 19

Kyle Sonaty
Kyle Sonaty

Reputation: 573

JaredPar is right but missed something and I don't have enough rep to edit it.

class spleen : foo 
{
     public spleen() : base()
}

If you parent class took in parameter in the constructor then it would be

class foo
{

     public int bar, wee, someotherint, someyetanotherint;

     public foo(int bar, int wee, int someotherint, int someyetanotherint)
     {
           this.bar = bar;
           this.wee = wee;
           this.someotherint = someotherint;
           this.someyetanotherint = someyetanotherint;

     }
}

class spleen : foo 
{
     public spleen(int bar, 
                   int wee, 
                   int someotherint, 
                   int someyetanotherint) : base(bar, 
                                                 wee, 
                                                 someotherint,  
                                                 someyetanotherint)
}

Upvotes: 5

Knowles Atchison
Knowles Atchison

Reputation: 61

Make the constructor protected:

protected Operator(String s, int i, boolean flag){
    operator = s;
    precedenceLevel = i;
    associative = flag;
}

//stuff

class MulOperator extends Operator {
protected MulOperator(String s, int precedenceLevel, boolean flag) {
    super(s, precedenceLevel, flag);
}

so on and so forth

EDIT: Assuming they have the same/similar constructor...

Upvotes: -3

Reed Copsey
Reed Copsey

Reputation: 564403

You just create it, and call the base constructor:

public spleen(int bar, int wee, int someotherint, int someyetanotherint)
    : base(bar,wee,someotherint,someyetanotherint)
{
    // Do any spleen specific stuff here
}

Upvotes: 7

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