Scope of variable - C# Discussion Boards

10-Jun-08 20:55

When u make a function call, all the value type of the calling function are pushed in stack. As soon as function returns control, the value types & memory used by variables inside function got released.

string and object are refrence type.

class A
{
string abc = "";// at class level.
...//some variables
...
...
}

class B
{
A obj = new A();
obj.abc = "Value";
}

class C
{
A obj = new A();
}

Now sequence in which these class got called is A->B->C.
What happen to value i stored in abc during class B, does It got restore to default by C class obj creation.

What is the scope of variables declare at class level, as soon as control comes out from a class does they restore to default?

Thanks & regards.

N a v a n e e t h10-Jun-08 20:58

N a v a n e e t h

10-Jun-08 20:58

Jon Skeet has an excellent article here[^]. It's worth reading.

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Hum Dum10-Jun-08 21:58

10-Jun-08 21:58

N a v a n e e t h wrote:
Jon Skeet has an excellent article here[^]. It's worth reading.

I did read that one. But i couldn't grasp whole. Cry | :((

will u please tell me, with refrence to my original post,
what value does abc hold if i use it after executing C class.

Re: Scope of variable [modified]

Guffa10-Jun-08 22:32

Guffa

10-Jun-08 22:32

humdumof wrote:
What happen to value i stored in abc during class B, does It got restore to default by C class obj creation.

No, the instance of A that is created in the B class is separate from the instance of A created in the C class.

humdumof wrote:
What is the scope of variables declare at class level, as soon as control comes out from a class does they restore to default?

At the class level, you have to distinguish between class members (static variables) and instance members (member variables). A static variable in a class exists only once and exists in the class rather than in an instance of the class. A member variable exists in an instance of the class, so it's separate for each instance. A member variable retains it's value as long as the instance exists.

Despite everything, the person most likely to be fooling you next is yourself.

Hum Dum10-Jun-08 23:30

10-Jun-08 23:30

Guffa wrote:
A member variable exists in an instance of the class, so it's separate for each instance. A member variable retains it's value as long as the instance exists.

class test
{
 string abc = "";
}

class Test2
{
 test t1 = new test();
 t1.abc = "some value";
 
 test t2 = new test();
 t2.abc = "next value";

}

Does it means as long as t1 exist(not garbage collected), t1.abc =="some value" ?
Means t1 is seprate & t2 is seprate copy?
Is it correct?

What i thought, suppose there exist A, B, C classes.

set the class A feild within B, then i was trying to access that value(which i set in B) in C by another obj created inside C.

We cant set like this, can we?

modified on Wednesday, June 11, 2008 5:55 AM

buchstaben10-Jun-08 23:45

buchstaben

10-Jun-08 23:45

humdumof wrote:
Does it means as long as t1 exist(not garbage collected), t1.abc =="some value" ?

..if you don't change the value

humdumof wrote:

Means t1 is seprate & t2 is seprate copy?
Is it correct?

t1 and t2 are different instance of Type test, yes.

Guffa11-Jun-08 1:02

Guffa

11-Jun-08 1:02

humdumof wrote:
Means t1 is seprate & t2 is seprate copy?
Is it correct?

Yes.

humdumof wrote:
What i thought, suppose there exist A, B, C classes.

set the class A feild within B, then i was trying to access that value(which i set in B) in C by another obj created inside C.

We cant set like this, can we?

No, you can't. They are separate instances, and they are not aware of each other.

Despite everything, the person most likely to be fooling you next is yourself.

Hum Dum11-Jun-08 1:17

11-Jun-08 1:17

Thanks a lot for your replies. Smile | :)

Reversing the string

namrata510-Jun-08 20:51

namrata5

10-Jun-08 20:51

How to reverse the string by the following manner ?

If string is "This is the test".

1] Reverse string should be "tset eht si siht"

2] other one: "siht si eht tset" (for this, using substring function)

J a a n s10-Jun-08 21:09

J a a n s

10-Jun-08 21:09

Homework ?
We won't help you; You have to do it yourself. We can help you when you are struck somewhere.

Krazy Programmer10-Jun-08 21:32

Krazy Programmer

10-Jun-08 21:32

How abt a loop which iterates the length times of the given string and stores the values from the last char index to first in another string

Try it once if u struck post code

If You win You need not Explain............
But If You Loose You Should not be there to Explain......

Roger Alsing10-Jun-08 21:37

Roger Alsing

10-Jun-08 21:37

string result = myString == "This is the test"?"tset eht si siht":"siht si eht tset".SubString(0,16);

That should do it, 100% according to your spec Wink | ;-)

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Programm3r10-Jun-08 21:44

Programm3r

10-Jun-08 21:44

With some logic thinking you can use the String.ToCharArray(); and the rest I leave up to you...

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Programm3r
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Russell Jones10-Jun-08 22:49

Russell Jones

10-Jun-08 22:49

I don't normally help with homework but today I'm feeling generous:

public string ReverseString1(string s)
{
return "tset eht si siht";
}

public string ReverseString2(string s)
{
return "siht si eht tset";
}