What do you need help with? Version 1

[Kill coDer]

I need to split a huge text file: [url]http://www.gutenberg.org/dirs/etext04/grimm10a.txt[/url]

Into 200 smaller text files with a certain formatting, with the title of each story being the filename, and the contents being the story.

What would be well suited to do this automatically?

[ZeekyHBomb]

You already know any programming language?

[shemer77]

Got only 3 questions this time,and 1 I already think I know the answer too :)

[QUOTE]An accessor function of a class first accesses the values of a member variable of the class and then changes the values of the member variable.
A) True
B) False [/QUOTE]

Not sure on this one

[QUOTE]class secretType
{
public:
static int count;
static int z;
secretType();
secretType(int a);
void print();
static void incrementY();
private:
int x;
static int y;
};
secretType::secretType()
{
x = 1;
}
secretType::secretType(int a)
{
x = a;
}
void secretType::print()
{
cout << "x = " << x << ", y = " << y
<< "z = " << z
<< ", count = " << count << endl;
}
static void secretType::incrementY()
{
y++;
}
Consider the accompanying class and member functions definitions. How many constructors are present in the class definition above?
A) 0
B) 1
C) 2
D) 3 [/QUOTE]

This is c right?

[QUOTE]class secretType
{
public:
static int count;
static int z;
secretType();
secretType(int a);
void print();
static void incrementY();
private:
int x;
static int y;
};
secretType::secretType()
{
x = 1;
}
secretType::secretType(int a)
{
x = a;
}
void secretType::print()
{
cout << "x = " << x << ", y = " << y
<< "z = " << z
<< ", count = " << count << endl;
}
static void secretType::incrementY()
{
y++;
}
Consider the accompanying class and member functions definitions. Which of the following statements correctly creates the object mySecret of type secretType and sets the value of the member variable x to 9?
A) secretType mySecret(9);
B) mySecret = secretType(9);
C) secretType = mySecret(9);
D) secretType(9).mySecret;
[/QUOTE]

not sure on this one either

[raccoon12]

[QUOTE=shemer77;23369753]Got only 3 questions this time,and 1 I already think I know the answer too :)

Not sure on this one

This is c right?

not sure on this one either[/QUOTE]
neither are c, and use [noparse][cpp]code[/cpp][/noparse] for code

[backwardspy]

1.) I THINK is false, not 100% sure
-> I think it's false because an "Accessor", as the name suggests, provides access to a member variable. Now, I'm not entirely sure, but I think it just means you can get the value of the variable, rather than changing it.
2.) Is C (Assuming that two constructors for the same class still counts as 2)
-> The SecretType class has two constructors:
[cpp]secretType();
secretType(int a);[/cpp]
Any function inside a class with the same name as the class and no return type is a constructor.
3.) Is A
-> The "secretType(int a)" constructor sets the value of X to whatever was passed as a. Therefore to create an instance of the class, and set X to 9 you would use option A:
[cpp]secretType mySecret(9);[/cpp]

Hope some of that makes sense...

Edit: Now with 100% more explanation

[blankthemuffin]

Guys telling him the answer is just dumb.

[Jallen]

[QUOTE=raccoon12;23370807][B]neither are c[/B], and use [noparse][cpp]code[/cpp][/noparse] for code[/QUOTE]

Wrong.

[Mattz333]

I'm having some problems with member initialisation in c++,I'm trying to write a 'World' class that takes a sf::RenderWindow in it's constructor before it takes over for the rest of the program. But I'm having problems initialising some of the classes members that require arguments.

class World
{
    //Functions
    public:
[b]
        World(const sf::RenderWindow& _App) : App(_App) {Init();};
[/b]
        void Init(); // This will set everything up
        void Loop();
        void Draw();
        virtual ~World();

    protected:
    private:

    // Variables

    public: [b]
        // SFML
        const sf::RenderWindow& App;[/b]
        sf::View View;
        sf::Vector2f viewPosition;
        sf::Vector2f viewSize;

        // Misc
        double dt;

        // Box2D
[b]
        b2Vec2 gravity;
        static const int pIterations = 2;
        static const int vIterations = 6;
        static const bool doSleep = true;
        b2World world;
[/b]
};

I've got the RenderWindow bit working, but the bolded code under 'Box2D' is where I'm having my problem. The constructor for b2World requires two arguments, a b2Vec2 (gravity) and a boolean (doSleep). I tried initialising the gravity member as a static const but that just threw errors at me (it takes 2 floats).

What do I need to do to get this code to work? How do I initialise these members properly?

[Overv]

If I have a class that needs to be accessed by several classes, is it best to pass a reference or pointer to it to all those classes?

[Jallen]

Well you are defining a class, not an instance, so initialise them in the constructor.

[editline]02:58PM[/editline]

[QUOTE=Overv;23378894]If I have a class that needs to be accessed by several classes, is it best to pass a reference or pointer to it to all those classes?[/QUOTE]

A reference because then you can be sure you aren't going to delete it and cause a shitstorm. (I guess if it's off the stack it doesn't really matter though)

[backwardspy]

[QUOTE=blankthemuffin;23377342]Guys telling him the answer is just dumb.[/QUOTE]
I was kinda expanding on raccoon12's answer a bit, and I was in too much of a rush to explain each one. I'll edit now

[Overv]

[QUOTE=Jallen;23378941]A reference because then you can be sure you aren't going to delete it and cause a shitstorm. (I guess if it's off the stack it doesn't really matter though)[/QUOTE]

I would use a reference, but the class is passed by a DLL.

[ZeekyHBomb]

[QUOTE=Overv;23379064]I would use a reference, but the class is passed by a DLL.[/QUOTE]

[cpp]myClass& getMyClass(){
return *myDllClassGetter();
}[/cpp]

[editline]04:56PM[/editline]

[QUOTE=Chris220;23376828]1.) I THINK is false, not 100% sure
-> I think it's false because an "Accessor", as the name suggests, provides access to a member variable. Now, I'm not entirely sure, but I think it just means you can get the value of the variable, rather than changing it.[/QUOTE]
You can do both if you provide a getter as well as a setter.
The way the question is written makes me confused, I don't think it's right what it says. Sounds more like a bit of mumbo-jumbo to me :S
[QUOTE=Chris220;23376828]2.) Is C (Assuming that two constructors for the same class still counts as 2)
-> The SecretType class has two constructors:
[cpp]secretType();
secretType(int a);[/cpp]
Any function inside a class with the same name as the class and no return type is a constructor.[/QUOTE]
Sure they do. However, it is not clear if that also includes implicitly generated constructors, like a copy-constructor.

[editline]04:58PM[/editline]

[QUOTE=Mattz333;23378457]I'm having some problems with member initialisation in c++,I'm trying to write a 'World' class that takes a sf::RenderWindow in it's constructor before it takes over for the rest of the program. But I'm having problems initialising some of the classes members that require arguments.

class World
{
    //Functions
    public:
[b]
        World(const sf::RenderWindow& _App) : App(_App) {Init();};
[/b]
        void Init(); // This will set everything up
        void Loop();
        void Draw();
        virtual ~World();

    protected:
    private:

    // Variables

    public: [b]
        // SFML
        const sf::RenderWindow& App;[/b]
        sf::View View;
        sf::Vector2f viewPosition;
        sf::Vector2f viewSize;

        // Misc
        double dt;

        // Box2D
[b]
        b2Vec2 gravity;
        static const int pIterations = 2;
        static const int vIterations = 6;
        static const bool doSleep = true;
        b2World world;
[/b]
};

I've got the RenderWindow bit working, but the bolded code under 'Box2D' is where I'm having my problem. The constructor for b2World requires two arguments, a b2Vec2 (gravity) and a boolean (doSleep). I tried initialising the gravity member as a static const but that just threw errors at me (it takes 2 floats).

What do I need to do to get this code to work? How do I initialise these members properly?[/QUOTE]

You using C++0x? I think this way of initialization is not available in former C++ versions. Unless it's some funky compiler extension.
Anyway, which errors did you get? And what's the code you used to initialize world?

[Mattz333]

[QUOTE=ZeekyHBomb;23379616][cpp]myClass& getMyClass(){
return *myDllClassGetter();
}[/cpp]

[editline]04:56PM[/editline]

You can do both if you provide a getter as well as a setter.
The way the question is written makes me confused, I don't think it's right what it says. Sounds more like a bit of mumbo-jumbo to me :S

Sure they do. However, it is not clear if that also includes implicitly generated constructors, like a copy-constructor.

[editline]04:58PM[/editline]

You using C++0x? I think this way of initialization is not available in former C++ versions. Unless it's some funky compiler extension.
Anyway, which errors did you get? And what's the code you used to initialize world?[/QUOTE]

Nevermind, figured out how I needed to fix it. I never realised that member constructors could be called with the correct arguments in the 'World' classes constructer. ie:

World(const sf::RenderWindow& _App) : App(_App) {Init();};

Changed to:

World(const sf::RenderWindow& _App) : App(_App), gravity(0,-9.8f), world(gravity, doSleep) {Init();};

Works ( didn't realise that I could call world/gravity member constructors, I thought it was just for assignment)

[raccoon12]

[QUOTE=Jallen;23377785]Wrong.[/QUOTE]
what?

[backwardspy]

[QUOTE=raccoon12;23382841]what?[/QUOTE]
You said number 2 isn't C, but it is :P

[zydos]

I need help getting laid

[editline]11:00AM[/editline]

Actually, that's as far from the truth as possible. BUT, I have a really random question. In Excel, I'm trying to edit a spreadsheet I've been working on for the last week. But everything is grayed out, and all I can do is copy/select boxes. I can't type, I can't edit, I can't save.

Help? It isn't in read-only mode, I'm clueless.

[raccoon12]

[QUOTE=Chris220;23383033]You said number 2 isn't C, but it is :P[/QUOTE]
-snip-
I thought he was asking if the language was C, probably should have read the whole thing

[jA_cOp]

[QUOTE=ZeekyHBomb;23379616]
You using C++0x? I think this way of initialization is not available in former C++ versions. Unless it's some funky compiler extension.[/QUOTE]

You're confusing the initializer-list syntax with constructor delegation. Initializer lists have been available for a long time.
[cpp]
class B
{
public:
B(int foo) : foo(foo) {} // initializer list

private:
int foo;
};

class A : B
{
public:
A(int foo) : B(foo) {} // explicitly call base constructor to pass arguments

A() : A(0) // C++0x: constructor delegation
{
otherInit();
}

private:
void otherInit();
};
[/cpp]

[QUOTE=Mattz333;23381928]Nevermind, figured out how I needed to fix it. I never realised that member constructors could be called with the correct arguments in the 'World' classes constructer. ie:

World(const sf::RenderWindow& _App) : App(_App) {Init();};

Changed to:

World(const sf::RenderWindow& _App) : App(_App), gravity(0,-9.8f), world(gravity, doSleep) {Init();};

Works ( didn't realise that I could call world/gravity member constructors, I thought it was just for assignment)

[/QUOTE]

Any reason your Init function is public?

[ZeekyHBomb]

No, I was talking about this stuff:
[cpp]static const int pIterations = 2;
static const int vIterations = 6;
static const bool doSleep = true;[/cpp]

[esalaka]

[QUOTE=jA_cOp;23388111]You're confusing the initializer-list syntax with constructor delegation. Initializer lists have been available for a long time.[/QUOTE]

What is this nonsense, initializer lists are C++0x, there's only been varargs.

[jA_cOp]

[QUOTE=ZeekyHBomb;23388326]No, I was talking about this stuff:
[cpp]static const int pIterations = 2;
static const int vIterations = 6;
static const bool doSleep = true;[/cpp][/QUOTE]

Ah, I see - but those aren't C++0x either. static const variables do not have linkage, be it part of a class or not.

[QUOTE=esalaka;23388660]What is this nonsense, initializer lists are C++0x, there's only been varargs.[/QUOTE]

Initializer lists are not at all related to varargs.

[esalaka]

[QUOTE=jA_cOp;23388757]Initializer lists are not at all related to varargs.[/QUOTE]

Yeah, I was thinking of that C++0x thing that looks like varargs but is actually useable. Probably I should actually read before I post next time...

[jA_cOp]

[QUOTE=esalaka;23389898]Yeah, I was thinking of that C++0x thing that looks like varargs but is actually useable. Probably I should actually read before I post next time...[/QUOTE]

Probably thinking of variadic templates, which can be used for type-safe varargs.

[Mattz333]

[QUOTE=jA_cOp;23388111]Any reason your Init function is public?[/QUOTE]

Just 'Cause

[ralle105]

I'm having some problems with SFML post effects.

Code:
[cpp]
sf::Image buff(800,600);

sf::PostFX ef;

ef.LoadFromFile("e.sfx");

ef.SetTexture("tex",&buff);
ef.SetParameter("pos",0.f,0.f,0.f);
[/cpp]
Content of e.sfx (yes it is in the right folder)

texture tex
vec3 pos

effect
{
	vec4 pix = tex(_in);

	_out = pix;
}

This error prints to the console window:

Parameter "pos" not found in post-effect

I bet it's got something to do with data types:saddowns:

[shemer77]

[QUOTE=Mattz333;23390638]Just 'Cause[/QUOTE]
thats a good reason

All right I got 10 questions, I have an idea for all of them, but i just want to make sure so I can get them right
Edit: please just dont give me the answer for the ones that i have no idea or put no comment on, and if you know the answer to only one of them thats fine too!

Consider the accompanying class definition, and the declaration:
rectangleType bigRect;
 
Which of the following statements is correct?
A) rectangleType.print(); 
B) rectangleType::print(); 
C) bigRect.print(); 
D) bigRect::print(); 
Lol I feel like I am missing something
---------------------------------
Which of the following correctly declares and initializes alpha to be an array of four rows and three columns and the component type is int? 
A) int alpha[4][3] = {{0,1,2} {1,2,3} {2,3,4} {3,4,5}}; 
B) int alpha[4][3] = {0,1,2; 1,2,3; 2,3,4; 3,4,5}; 
C) int alpha[4][3] = {0,1,2: 1,2,3: 2,3,4: 3,4,5}; 
D) int alpha[4][3] = {{0,1,2}, {1,2,3}, {2,3,4}, {3,4,5}};
 
I belive its a or b 
----------------------------------
Which of the following is a legal C++ function definition? 
A) void funcAlpha(int u, double v &)
{
    cout << u << " " << v << endl;
} 
B) void funcAlpha(int #, double #)
{
    cout << u << " " << v << endl;
} 
C) void funcAlpha(int &, double &)
{
    cout << u << " " << v << endl;
} 
D) void funcAlpha(int u, double& v)
{
    cout <<u << " " << v << endl;
}
 
i believe its d
-----------------------------------
Consider the following code. (Assume that all variables are properly declared.)
cin >> ch;
while (cin)
{
    cout << ch;
    cin >> ch;
}
This code is an example of a(n) ____ loop. 
A) sentinel-controlled 
B) flag-controlled 
C) EOF-controlled 
D) counter-controlled 
eof controlled right?
-----------------------------------------
suppose that ch1, ch2, and ch3 are variables of the type char and the input is:
A B
C
Choose the value of ch3 after the following statement executes: 
cin >> ch1 >> ch2 >> ch3;
A) 'A' 
B) 'B' 
C) 'C' 
D) '\n' 
-----------------------------------------
Suppose that x is an int variable, y is a double variable and ch is a char variable and the input is: 
15A 73.2
Choose the values after the following statement executes: 
cin >> x >> ch >> y;
A) x = 15, ch = 'A', y = 73.2 
B) x = 15, ch = 'A', y = 73.0 
C) x = 15, ch = 'a', y = 73.0 
D) This statement results in an error because there is no space between 15 and A. 
I think its A but d is messing with me
------------------------------------------
The values of an enumeration type cannot be output directly to the standard output device. 
A) True 
B) False 
I have no idea
------------------------
 
The declaration char str[] = "Sunny Day"; declares str to be a string of unspecified length. 
A) True 
B) False 
Im pretty sure this is false
-------------------------------
enever the value of a reference parameter changes, the value of the actual parameter changes. 
A) True 
B) False 
 I looked up actual and refrence paramaeters but didnt really help me
-------------------------
The statement return static_cast<char>(x + 5); where x is an int variable, returns a char value in a value-returning function. 
A) True 
B) False 

[backwardspy]

Where do you get these questions from? I'd quite like to do some to stretch my knowledge :3:

[shemer77]

their from a book, which is for a class im taking in school

Ill pm you the book

[jA_cOp]

[QUOTE=shemer77;23405412]
Consider the accompanying class definition, and the declaration:
rectangleType bigRect;

Which of the following statements is correct?
A) rectangleType.print();
B) rectangleType::print();
C) bigRect.print();
D) bigRect::print();
Lol I feel like I am missing something
[/QUOTE]

It depends on the accompanying class definition, which you haven't provided.

[QUOTE=shemer77;23405412]
---------------------------------
Which of the following correctly declares and initializes alpha to be an array of four rows and three columns and the component type is int?
A) int alpha[4][3] = {{0,1,2} {1,2,3} {2,3,4} {3,4,5}};
B) int alpha[4][3] = {0,1,2; 1,2,3; 2,3,4; 3,4,5};
C) int alpha[4][3] = {0,1,2: 1,2,3: 2,3,4: 3,4,5};
D) int alpha[4][3] = {{0,1,2}, {1,2,3}, {2,3,4}, {3,4,5}};

I belive its a or b
[/QUOTE]
It's D), none of the others are syntactically correct.

[QUOTE=shemer77;23405412]
----------------------------------
Which of the following is a legal C++ function definition?
A) void funcAlpha(int u, double v &)
{
cout << u << " " << v << endl;
}
B) void funcAlpha(int #, double #)
{
cout << u << " " << v << endl;
}
C) void funcAlpha(int &, double &)
{
cout << u << " " << v << endl;
}
D) void funcAlpha(int u, double& v)
{
cout <<u << " " << v << endl;
}

i believe its d
[/QUOTE]
You're right :)

[QUOTE=shemer77;23405412]
-----------------------------------
Consider the following code. (Assume that all variables are properly declared.)
cin >> ch;
while (cin)
{
cout << ch;
cin >> ch;
}
This code is an example of a(n) ____ loop.
A) sentinel-controlled
B) flag-controlled
C) EOF-controlled
D) counter-controlled
eof controlled right?
[/QUOTE]
Right again. This is possible because 'cin' has a special operator overload which enables it to be implicitly cast to a pointer. The returned pointer is null if the stream has closed or an error occurred, hence terminating the loop.

[QUOTE=shemer77;23405412]
-----------------------------------------
suppose that ch1, ch2, and ch3 are variables of the type char and the input is:
A B
C
Choose the value of ch3 after the following statement executes:
cin >> ch1 >> ch2 >> ch3;
A) 'A'
B) 'B'
C) 'C'
D) '\n'
[/QUOTE]

ch1 gets the first character, which is 'A'. ch2 gets the second, which is a space. ch3 thus ends up with the third character, 'B'.

[QUOTE=shemer77;23405412]
-----------------------------------------
Suppose that x is an int variable, y is a double variable and ch is a char variable and the input is:
15A 73.2
Choose the values after the following statement executes:
cin >> x >> ch >> y;
A) x = 15, ch = 'A', y = 73.2
B) x = 15, ch = 'A', y = 73.0
C) x = 15, ch = 'a', y = 73.0
D) This statement results in an error because there is no space between 15 and A.
I think its A but d is messing with me
[/QUOTE]

It is indeed A.

[QUOTE=shemer77;23405412]
------------------------------------------
The values of an enumeration type cannot be output directly to the standard output device.
A) True
B) False
I have no idea
[/QUOTE]

That would be false, but of course, it would have its numeric representation, so the question is arguably ambiguous.

[QUOTE=shemer77;23405412]
------------------------

The declaration char str[] = "Sunny Day"; declares str to be a string of unspecified length.
A) True
B) False
Im pretty sure this is false
[/QUOTE]
The compiler does in fact know the length of str, you can test this like so:
[cpp]
char str[] = "Sunny Day";
std::cout << sizeof(str) << std::endl;
[/cpp]

(Is your book a bit out of date? The type of a string literal is "const char[]", not "char[]", in modern C++)

[QUOTE=shemer77;23405412]
-------------------------------
enever the value of a reference parameter changes, the value of the actual parameter changes.
A) True
B) False
I looked up actual and refrence paramaeters but didnt really help me
[/QUOTE]
This is true, although it's a bit poorly put. The reference [I]is[/I] the parameter, so there's no 'actual parameter'.

Take this example:
[cpp]
#include <iostream>

void setToOne(int& i)
{
i = 1;
}

int main()
{
int i = 0;
setToOne(i);
std::cout << i << std::endl;
}
[/cpp]
If you had received 'i' by value (as opposed to by reference) in 'setToOne', the output would be 0.

[QUOTE=shemer77;23405412]
-------------------------
The statement return static_cast<char>(x + 5); where x is an int variable, returns a char value in a value-returning function.
A) True
B) False
[/QUOTE]

This is true, but this is casting basics, so you should really just look it up.

if anyone has any corrections or injections to make, please help me out :v: