Hi,
What is the Diff btwn Function overloading and overriding
thanks,
a.a.cpp 11 8904
iceColdFire wrote: Hi, What is the Diff btwn Function overloading and overriding
Overloading refers to the selection of multiple signatures of functions
of the same name:
A(int x);
A(std::string s);
A(double d);
is overloading the function name A.
Overriding refers to functions that have the same signature as a
virtual function in the base class:
class B {
virtual void V();
};
class D : public B {
viod V();
};
D::V overrides B::V.
iceColdFire wrote: Hi, What is the Diff btwn Function overloading and overriding
Yes. They are two totally different concepts. Overloading means that you can
have several different functions with the same name.
Overriding means that out of several functions, the 'right' one is selected
at run-type depending on the dynamic type of an object.
Hi
Function overloading is when you have same function names with
different signatures.
Remember the signature just refers to the number and type of arguments.
The return type does not matter.
Soo,
int area(int side);
int area(int length, int breadth);
int area(int length, int breadth, int height);
are valid examples of overloading.
However,
int area(int side);
float area(int length);
are not valid examples of overloading since the signature is the same
and the only difference is in the return type.
Jaspreet wrote: However, int area(int side); float area(int length);
are not valid examples of overloading since the signature is the same and the only difference is in the return type.
It's a perfectly valid form of overloading, it just may be ill-formed
or ambiguous depending on the context.
Ron Natalie wrote: Jaspreet wrote:
However, int area(int side); float area(int length);
are not valid examples of overloading since the signature is the same and the only difference is in the return type.
It's a perfectly valid form of overloading,
No, it's not.
it just may be ill-formed or ambiguous depending on the context.
There is no context in which C++ allows function overloading only by return
type.
> However, int area(int side); float area(int length); are not valid examples of overloading since the signature is the same
and the only difference is in the return type.
It's a perfectly valid form of overloading, it just may be ill-formed
or ambiguous depending on the context.
I am using gcc 3.2.2 and it gives me the following error: >>>>>new declaration `float area(int)' >>>>>ambigu ates old declaration `int area(int)'
Jaspreet wrote: However, int area(int side); float area(int length); are not valid examples of overloading since the signature is the same
and the only difference is in the return type.
It's a perfectly valid form of overloading, it just may be ill-formed or ambiguous depending on the context.
I am using gcc 3.2.2 and it gives me the following error:
>>>>>>new declaration `float area(int)' >>>>>>ambig uates old declaration `int area(int)'
And this counters what I said how?
Ron Natalie wrote: Jaspreet wrote:
However, int area(int side); float area(int length);
are not valid examples of overloading since the signature is the
same and the only difference is in the return type.
It's a perfectly valid form of overloading, it just may be ill-formed or ambiguous depending on the context.
Hi Ron
You mentioned it is a **perfectly valid form of overloading**. It is
not.
Ron Natalie wrote: Jaspreet wrote:However, int area(int side); float area(int length); are not valid examples of overloading since the signature is the same
and the only difference is in the return type.
It's a perfectly valid form of overloading, it just may be ill-formed or ambiguous depending on the context.
I am using gcc 3.2.2 and it gives me the following error:
>>>>>>>ne w declaration `float area(int)' >>>>>>>ambi guates old declaration `int area(int)'
And this counters what I said how?
It doesn't. However, how about giving an example that proves your claim? This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Susan Baker |
last post by:
Hello everybody,
I'm new to C++ (I have some C background). I've read up on this topic a
few times but it just dosen't seem to be sinking in.
1. Whats the difference between overloading and overriding?
2. When is one preferable to use as opposed to the other?
3. How are virtual functions related to this topic
(overloading/overriding) - a real world example of using virtual
functions would be very much appreciated.
|
by: Iyer, Prasad C |
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I am new to python.
I have few questions
a. Is there something like function overloading in python?
b. Can I overload __init__ method
Thanks in advance
regards
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They looks so similar. Anybody would like to tell me their differences?
Thanks a lot.
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by: bb |
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Hi,
Why overriding "virtual void f(std::string)" as follows hides the "non-
virtual void f(int)" ?
compilation error C2664: 'D::f' : cannot convert parameter 1 from
'int' to 'std::string'
I know it will work if I bring it to the scope by B::f(). I just would
like to know why does it hide just because am implementing a virtual
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Hi,
Ones more I have a stupid virtual function question. Assume the
following simple lines of code
class Parent {
public:
virtual Parent foo(Parent &);
virtual void bar(Parent &);
}
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