oops interface called varibletest

Sinu Joseph

create an interface called VariableTest Which contains A method called disp() and 2 variables x,y which are integers and whose value is set as 10 and 20 . create a class called VarLntTest which impliments this Interface . the disp() method should display a message "inside interface-variableTest and method disp" write a method called display() within VarIntTest class which prints the value of x

CAN U GUYS PLZ HELP ME TO FIND OUT THIS ANS AND PLZ GIVE EXPLAANTION OF THIS PROBLEM TOO ..
I WANT TO KNOW THE LOGIC THTS Y ..
..

4 Replies

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Vulpes13y ago
Accepted answer
Unfortunately, the question you've been give doesn't make much sense since an interface in C# can only contain methods, properties, indexers or events. It cannot contain variables.

However, in order to do something, we'll put the variables in the class which implements the interface:

using System;

interface VariableTest
{
void disp();
}

class VrLntTest : VariableTest
{
int x = 10;
int y = 20;

// this implements the interface's disp method
public void disp()
{
Console.WriteLine("inside interface-variableTest and method disp");
}

public void display()
{
Console.WriteLine("the value of x is {0}", x);
}
}

class Test
{
static void Main()
{
VrLntTest vlt = new VrLntTest(); // create a new VrLnTest object
vlt.disp(); // call disp method
vlt.display(); // call display method;

/* Now assign the VrLntTest object to a VariableTest variable.
This is allowed because the former implements the latter.
Also demonstrate that we can call the disp method via
a VariableTest variable.
*/

VariableTest vt = vlt;
vt.disp(); // call disp method via interface variable
Console.ReadKey();
}
}

The output should be:

inside interface-variableTest and method disp
the value of x is 10
inside interface-variableTest and method disp

Notice that you'll get a compiler warning that 'y' is assigned but is never used. Just ignore this.
Vulpes13y ago
As it's a different question, I'll answer it on the other thread.
Sinu Joseph13y ago
1.craete a class called "car" with 2 data members namely :"No Of doors" and "no of wheels" create 2 methods to accept the values of the said data members and to display the values on the screen. create an object to test the above class;

2.create an interface called "ifunction" and put signature of 2 methods namely"getfueltype" and "setfueltype" function will return the fueltype of the car such as petrol,diesal etc and setfueltype fun will set the fueltype of the car . after creationg the interface modify the above car class to implement the interface

=plz help me...
Sinu Joseph13y ago
thank u sooo much vipes u helped me a lot...
i hope u will help me next time also