Have anyone try to use default parameter function?

Question

1.00/5 (1 vote)

See more:

if i have two method

C#

void method(string str="")
{
//logic
}

void method()
{
//logic
}

and i am calling it

void main()
{
method()
}

which one is called?

What I have tried:

interview question that is asked it gives any error runtime or compile time?

Posted 18-Oct-16 21:23pm

RaunakGupta

Updated 19-Oct-16 4:13am

CPallini

v2

Add a Solution

Comments

Bernhard Hiller 19-Oct-16 3:38am

Why don't you just open up VS and paste that code there?

johannesnestler 19-Oct-16 8:25am

interesting question, but why ask it here? - what you do during programming work if you don't know: Try it! or read MSDN: https://msdn.microsoft.com/en-us/library/dd264739.aspx (have a look at 'overload resolution' at the bottom of the page)

5 solutions

Add a Solution

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Karthik_Mahalingam · Answer 1 · 2016-10-18T22:02:00

Solution 1

Create a console application and run this code to see which method is being called.

C#

using System;

class Program
{

    static void Main()
    {
        method();
        Console.ReadLine();
    }

    static void method(string str = "")
    {
        Console.WriteLine("method(string str = \"\")");

    }

    static void method()
    {
        Console.WriteLine("method()");
    }
}

Posted 18-Oct-16 22:02pm

Karthik_Mahalingam

Comments

CPallini 19-Oct-16 6:34am

5.Experimental evidence :-)

Karthik_Mahalingam 19-Oct-16 12:15pm

Thank you CPallini :)

#realJSOP · Answer 2 · 2016-10-19T01:34:00

Solution 2

If you're interviewing for a programming job, and it never occurred to you to try it yourself and see, do you honestly think you've selected an appropriate career path?

Posted 19-Oct-16 1:34am

#realJSOP

johannesnestler · Answer 3 · 2016-10-19T02:38:00

So does anyone know a way to force the use of the method with the default parameter?

I thought of a solution with a special delegate for this case - But this doesn't work like I first thought: look how this behaves...

C#

class Program
 {
     delegate void methodDelegate(string str = "ABC");

     static void Main()
     {
         method();
         methodDelegate methodWithOptionalParameter = method;
         methodWithOptionalParameter.Invoke();

         Console.ReadKey();
     }

     static void method(string str = "XYZ")
     {
         Console.WriteLine("method(string str = \"{0}\")", str);

     }

     static void method()
     {
         Console.WriteLine("method()");
     }

 }

(hint: it uses the default value from the delegate Definition)

RaunakGupta · Answer 4 · 2016-10-19T03:47:00

Solution 4

yes, i have try out it and i got the answer. it is simple overloading mechanism and c# complier call parameter less mathode first. it will not give any error. work fine.
thanks

Posted 19-Oct-16 3:47am

RaunakGupta

Member 12802753 · Answer 5 · 2016-10-19T04:13:00

Solution 5

method' is ambiguous '
Candidates are:
void method()
void method(std::__cxx11::basic_string<char,std::char_traits<char>,std::allocator<char>>)
'

Posted 19-Oct-16 4:13am

Member 12802753

Comments

#realJSOP 19-Oct-16 10:18am

This is a C# question, not a C++ question. Your answer is irrelevant.

Have anyone try to use default parameter function?

5 solutions

Solution 1

Solution 2

Solution 3

Solution 4

Solution 5

Add your solution here

Preview 0

Have anyone try to use default parameter function?

5 solutions

Solution 1

Solution 2

Solution 3

Solution 4

Solution 5

Add your solution here

Preview 0

Existing Members

...or Join us