'virtual' means, 'keep a record inside the class for which function I should call'. Otherwise, the compiler doesn't know anything except the type of the variable/pointer.
For example:
Adding virtual allows it to remember that f() was overloaded / replaced. This memory takes a little space.
hi all
im working in tcsh shell.
In sh shell i write for example:
case in $www
1 | 2 | 3)
arguments;;
4 | 5 | 6)
arguments;;
esac
can anybody tell me the equivalent to tcsh of
1 | 2 | 3)? (2 Replies)
Hi,
I have a base class and derived a class from the base class, i want to print & read the data for the object created for the derived class,so i have overloaded both the << and >> operators and also have done the foward declaration.
Below is the code snippet,
#include <iostream>
class... (3 Replies)
is it possible to use multiple conditions in a CASE statement? And if so, what is the syntax? I'm trying to use one but can't seem to get it right. I want the statement to be
CASE $vendor OR $alias
condition 1) statements;
condition 2) statements;
etc.
esac
but I keep... (25 Replies)
Hi all,
I am attempting to create a shell script to optimize some routine process.
I want this script can let user select the actions they want to do.
But I met a problem that my script can only read one input and then do one action.
Is it possible to let my script to run more than one... (2 Replies)
Hi all!
I am trying to register a device in an existing device class, but I am
having trouble getting the pointer to an existing class.
I can create a class in a module, get the pointer to it and then use
it to register the device with:
*cl = class_create(THIS_MODULE, className);... (0 Replies)
Hi,
In multi-level inheritance:
class A {
public:
void fun() { cout << "A" << endl; }
};
class B : public A {
public:
void fun() { cout << "A" << endl; }
};
class C : public B { };
int main() {
C c;
c.fun(); // Ans: A
} (1 Reply)
I have the two class definition as follows.
class A { public: int a; };
class B : virtual public A{ };
The size of class A is shown as 4, and size of class B is shown as 16. Why is this effect ?. (2 Replies)
Hello All,
I am a learner in C++. I was testing my inheritance knowledge with following piece of code.
#include <iostream>
using namespace std;
class base
{
public :
void display()
{
cout << "In base display()" << endl;
}
void display(int k)
{... (2 Replies)