Posts by athlon32

Not a prob :) Could you please mark this as solved?

also, in your original code you used: system("PAUSE"); , I remember reading that it's not a good practice to use system

i suggest using sleep() declared in Windows.h :)

2. Why address of a and b are same.

They are not, i ran it on my computer and i get 2 different addresses

3. If I use copy constructor here, then the first line of main() is giving error

Look at my answer to #5

4. Constructor is getting called for object b which it should be, but destructor is getting called for object a.

I don't think so, I removed the function fun() and left only a, and it gave me both destructor/constructor messages...i think the des/con aren't being called on B :?

5)Why am i not allowed to create a copy-constructor in this class?

Because it should be like this:

class A{
      int i;
      public:
            A(){
                   cout<<"default constructor\n";
            }
            ~A(){
                   cout<<"default destrutor\n";
             }


            A(A& obj);
};

and this:

A::A(A& obj)
{
                  i=obj.i;
                  cout<<"copy constructor\n";
};

Here, your code should be:

#include <iostream>

using namespace std;

class A{
      int i;
      public:
            A(){
                   cout<<"default constructor\n";
            }
            ~A(){
                   cout<<"default destrutor\n";
             }

};


A fun(){
      A b;
      cout<<" address of b = "<<&b<<endl;
      return b;
}

int main(){
      A a;
      fun();
      cout<<" address of a = " << &a<<endl;
      return 0;
}

First lemme say,So far so good. Whether or not you need a DB for this application depends on its complexity. If this is just a little thing, I wouldn't bother, but if this a full scale, or extremely complex situation, then look to a database.

To check and see if the two string matches you could do something like this(I wrote this example in C++, but you could do this in C#):

/*** Comparing two strings ***/
#include <iostream>

using namespace std;

int main()
{
    string a="Hello";
    string b="wasup";

    if(b == a)
    {
        cout << "they are the same";
    }
    else {cout << "they are different";}

    return 0;
}

hope i helped :)