C++ Quiz starts here...>

powergirl

Let me start a Quiz based on c++ programming in this thread.
You are requested to give the right answer in quotes;
RULE:
No special rules are there.Anyway,
>>The person who tells the right answer must post the next question,No one must post Q's in between.
The person who answers must post a question,next to Ur answer.

Think and answer....

powergirl

Let me start from easy Q's;

1)C++ programming language was developed at....?

Crosson

Bell Labs, and it had been called C with _____....?

neutrino

Classes

Can't come up with anything tougher: Who invented the language?

chemhelper

Stroustrup (if that is spelled correctly)

The ++ in C++ refers to _____

kingtazie

++ is shorthand of +=1 which C++ implements.

List the different types of variables that can be called.

verty

Can be called?

Hmm...
#1: char, short, int, long, _int64
#2: unsigned char, unsigned short, etc
#3: char[], short[], int[], etc
#4: char *, short *, int *, etc
#5: const char *, const short *, etc
#6: char * const, short * const, etc
#7: const char * const, etc
#8: char **, short **, etc
#9: const variations of #8
#10: char[][], etc

I'm not sure if there are variations that mix [] and *, I guess there would be, like (char*)[].

Then:
#11: float, double, long double
#12: float[], double[], etc
etc

Then obviously structs and classes are types. I've probably missed a bunch.

List the bitwise operators of C++.

twisting_edge

You forgot "void *". Even though there can't really be a variable of type void, you can certainly have a pointer to one.

Gotta love C++.

twisting_edge

& - and
| - or
^ - xor
~ - not (bitwise)
>> - shift right
<< - shift left

What does the following code fragment do?

(void *(*)(...))

Hurkyl

Don't forget fun types like

int (* (*[10]) (long, void*) ) (const char*, int *[])

!

twisting_edge

A generally malformed question, I think. It was a little too wide open.

Managed to translate my typecast into English, yet?

neurocomp2003

void *(*)(...) ...a function pointer to a function that returns some buffer.

[0] What is the main difference between C and C++
[1] What does :1 do in a variable declaration.

dmail

It uses C to do a job in C++ when it really it shouldn't be used, it uses the dreaded void pointer and a variable argument list.

0)see neutrino's post.
1)It's a bit field.

What is the only difference between a struct and a class?

Your.Master

Struct is default public, class is default private.

What's the difference between a virtual destructor and a virtual function?

powergirl

Virtual Functions and Destructors

A virtual function is a member function of a class, whose functionality can be over-ridden in its derived classes. It is one that is declared as virtual in the base class using the virtual keyword. The virtual nature is inherited in the subsequent derived classes and the virtual keyword need not be re-stated there. The whole function body can be replaced with a new set of implementation in the derived class

A virtual destructor is one that is declared as virtual in the base class and is used to ensure that destructors are called in the proper order. It is to be remembered that destructors are called in the reverse order of inheritance. If a base class pointer points to a derived class object and we some time later use the delete operator to delete the object, then the derived class destructor is not called.


???CAN U NAME THE SPECIAL FUNCTIONS A C++ COMPILER CAN CREATE IMPLICITY?

DanielKO

This got a bit confusing. When destructing an object, you have to call the correct destructor; the virtual destructor plays the same role as virtual methods. Virtual destructors are useful when deleting the objects through a base pointer (like virtual methods are useful when calling the methods through a base pointer).

So in the end, the difference between virtual destructors and virtual methods is the same between plain destructors and plain methods.


Default and copy constructors, destructor and assignment operator.



Why using isspace(), isdigit(), etc, from <cctype> is dangerous? What's the safe alternative? (Hint: find out why char is different from signed char and unsigned char)

Hurkyl

At the very least, you missed the comma operator. (Does new, new[], delete, and delete[] count too? Hrm)