C++ :: Create A Method (constructor) To Initialize Bigint To Given Int Value

Sep 14, 2013

I need to create a method (constructor) to initialize a bigint to an int value you provide [0, maxint].

Example: bigint(128).

Here is my class:

#ifndef BIGINT_H
#define BIGINT_H
const int MAXINT = 500;
class bigint{
public:
bigint();

[Code] ....

So if the user inputs (4123 for example). How would I make 4 in size[0], 1 in size [1], 2 in size [2], etc. I don't even know where to start. Im guessing I would start with a for loop. It has to be an integer. I cant use a string yet.

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C# :: List Initialize In Object Initialization Method

Oct 31, 2014

public class Customer
{
public int Id { get; set; }
public string Name { get; set; }
public List<Order> Orders { get; set; }
public Customer() {
Orders = new List<Order>();
}
}

This object is called as

var cust = new Customer
{
Id = 1, Name = "Khatana", [b]Orders.Add(new Order())[/b]
}

I want to ask, Orders.Add(new Order()) is a wrong way, but why..!!... as List<Order> already has been initialized in Customer constructor, then why it is again required to be initialized in object initialization.
Is this a correct way

List<Order> orders = new List<Order> {aaa.....bb....cc};
var cust = new Customer
{
id = 1, Name = "Khatana", Orders = new List<Order> { orders }
}

Why we need to initialize a list in an object initialization, where as the list has been already initialized in object constructor.

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C++ :: Initialize Array In A Constructor?

Dec 6, 2013

There are two class.How can I initialize an array of different class in a constructor?

class Ticket{
private:
int ID;

[Code]....

I have to provide a no-argument constructor (Cinema();)to initialize the ticket array and give the right ticket ID.

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C++ :: Can't Initialize String Array In Constructor

Jul 22, 2013

I am currently practicing designing classes. In one exercise, I am trying to store 15 words in an array, and randomly print one (using the rand() functions and seeding it with crime. I have a header file, a respective .cpp file, and a main .cpp file. When I try to compile the code using g++ GuessWord.cpp UseGuessWord.cpp -o UseGuessWord, I get the following error in my constructor: expected primary-expression before ‘{’ token

Here is my code:

header file (GuessWord.h):
#ifndef GUESSWORD
#define GUESSWORD
#include <string>
using namespace std;

[code].....

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C/C++ :: Constructor To Initialize Each Members Of Array?

May 3, 2014

Need a C++ constructor to initialize each members of an array. how to give value for for each elements of an array declared as a class object according to the users input.

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Visual C++ :: Initialize Constructor In Array Of Objects?

Oct 28, 2012

What the best way to initialize a constructor in an array of objects?

Usually I declare an array of objects like so:

Code:
Car toyota[100];

Is this the only way I know to initialize a constructor of an array:

Code:
for (int i = 0; i < 100; i++)
{
toyota[i] = Car(x, y);
}

Is this the proper way?

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C++ :: Can A Class Constructor Be Called Like A Method?

May 17, 2013

When the below is done, does it call the constroctor only, and if yes, constructors do not have return types so how does it work? is there anything behind the scene?

wxAddHandler(new wxPNG_HANDLER);
and
sf::RenderWindow(sf::VideoMode(...),...);

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C++ :: Using Static Method To Check Arguments Before Calling Constructor?

Mar 1, 2013

I would like to avoid throwing things in constructors as much as possible.

Is this good design to have a static class method that checks arguments the caller will give to the constructor. The documentation of the class will say, thou shall call this method to validate thine arguments before calling the constructor, or else segfault may befall thoust.

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C++ :: Bigint - Global Constant Size

Sep 14, 2013

I am making a class called "bigint" and i have to have a global constant "size". How do I make that global "size" the size of bigint? If "size" is an array and "bigint" is an object how does that work? Heres the instructions for the program..

Requirements:
-You must use the class construct to implement your ADT.
-The ADT bigint need only work for positive numbers.
-Use a global constant value for the maximum size of the bigint that is, a constant sized array.

Implementation:
-The size of the bigint must be specified by a global constant
-A method (constructor) to initialize a bigint to zero.
-A method (constructor) to initialize a bigint to an int value you provide [0, maxint]. Example: bigint(128).
-A method (constructor) to initialize a bigint to a char[] you provide. You can assume what is provided is a valid bigint. Example: bigint("299793").
-A method to write a bigint that prints at most 60 digits per line.
-A method to compare if two bigints are equal. It should return a bool - true if equal and false otherwise.

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C++ :: How To Create Template Method In A Class

Jul 8, 2014

Code:

class A {
public:
template<class T>
ObjectsBase* createObject(T* objType, Ogre::String name, Ogre::Vector3 position);
};
template<class T>
ObjectBase* A::createObject(T* objType, Ogre::String name, Ogre::Vector3 position);

My goal is to create any ObjectBase* derived object and return it to class A....

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C++ :: How To Create Array With Size Of Another Method Returning Value

May 29, 2013

I have to create array with size that returns from method

int val=test();
int arr[val];
int test()
{
// Some logic and getting result as 5
return 5;
}

I would like to create arr with 5. how can i do this.

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Visual C++ :: Windows Form - Create Method With Parameters

May 16, 2013

I am wanting to separate the logic from the visual, but I'm having problems when calling the method that controls the actions of the progress bar timer.

Code:

ifndef PROGRESS_BAR
define PROGRESS_BAR
class Progress_bar{
public:
void set_Progress(ToolStripStatusLabel^ label,Timer^ time){

[Code] ....

The way that I'm calling this method on Form1.h

void set_Progress(toolStripStatusLabel1 ,timer1);

Errors:

Error1error C2182: 'set_Progress' : illegal use of type 'void'h:cry_devprogrammingc++school_mediaschool_mediaForm1.h277
Error2error C2078: too many initializersh:cry_devprogrammingc++school_mediaschool_mediaForm1.h277
Error3error C2440: 'initializing' : cannot convert from 'System::Windows::Forms::Timer ^' to 'int'h:cry_devprogrammingc++school_mediaschool_mediaForm1.h277

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C++ :: Create A Copy Constructor?

Dec 11, 2013

copy constructor. I'm not really understanding them. I have a base class called Vehicle and a derived class called Car.

class Vehicle
{
private:
int age;

[Code].....

I'm trying to test the new attributes and behavior of car but I think its not working because of the copy constructor. Its just not clicking. I also forgot that race car status is supposed to return yes or no, am I defining that right?

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C++ :: Create Two Box In Program Using Default Constructor

Apr 6, 2014

Im trying to create two box in this program using the default constructor. When i call to try and display the info, it says that x, y, and z are not declared in this scope. i wanted to have the user cin the length, height, and width using the void setBox function.

#include<iostream>
#include<string>
#include<cstdlib>
using namespace std;
class Box{
public:

[code]....

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C++ :: Class Constructor To Create Date And Time?

Mar 13, 2014

I am trying to create two classes: a Date class and a Time class. The Date class has to have three private data members: day, month and year. The Time class should have two private data members:hour and minute. Each class should have two member functions: a constructor and display. I am lost and my code won't run ....

class Date {
private:
int month, day, year;
public:
Date(int m, int d, int y){
month = m;
day = d;
year = y;

[code]....

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C++ :: Undefined Reference To (method Name) When Accessing Method In Static Library

Jan 17, 2013

I've been trying for more than one month to access a method found in a library called libcocosnas_static.a. I'm using Cocos2d-X version 2.0.4. The library has been used many times by my company to make games using cocos2d-1.0.1-x-0.12.0 without any problem.

This is what I've done:
1- I added the include paths of the library to both eclipse and Android.mk
2- Included the .h file using #include "NASPlatformUtil.h"
3- Added the libcocosnas_static.a file to the proj.androidobjlocalarmeabi folder
4- Added "LOCAL_WHOLE_STATIC_LIBRARIES += cocosnas_static" to the Android.mk file
5- Called the function using: NASPlatformUtil:: openUrl("http://xxx.xxx.com/");

I can right click on the function, click Open Declaration and get it without any problem, but the compiler keeps on giving me that dreaded error...

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C++ :: No Constructor Could Take Source Type Or Constructor Overload Resolution Was Ambiguous

Mar 1, 2014

i am writing this bank accounts program using structures. i haven't implemented the function before that i want to check if the data is being read and printed. When i build and run the program in visual studio it gives me the following error. "No constructor could take the source type, or constructor overload resolution was ambiguous". Now whats wrong in this program?

/* Bank Accounts Program */
#include <iostream>
#include <string>
#include <fstream>
#include <cstdlib>//needed to use system() function
using namespace std;
const int MAX_NUM = 50;
struct Name{

[code]....

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C++ :: Calling Constructor From Constructor Set Pointer To Null

Jan 25, 2014

VS 2012 / Windows 7 64 bit

class
class myclass {
public:
myclass(){/*stuff here*/}
myclass(int* p) {MyPointer = p; myclass()}

[Code] ....

it works until the myclass(int* p) calls myclass()

then the MyPointer will become CCCCCCCC (NULL value)!

is there a way to stop the second constructor from resetting the pointer value to null?

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C++ :: Pass Method Of Derived Class As Parameter To Another Method In Base Class?

Feb 2, 2015

I have a question similar to the one here: [URL] .....

The main difference is I would like to pass a method of derived class as a parameter to some other method in its template base class.

template <typename BaseType>
class Base {
public:
typedef void (Base::*Callback)(int A);

[Code] .....

The above is an example which does not compile. My compiler complains that the two BaseMethod() calls in DerivedMethod() are invalid uses of non-static member function.

Is this not possible to do, or is my syntax simply wrong? All I want is to be able to pass as an an argument to a method in the base class from the derived class some callback as a variable for the base class to invoke later.

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C++ :: Using Constructor Within Constructor In Same Class

Feb 28, 2012

I am trying to use constructor within constructor in the same class. Is that possible. I have tried something and it shows me a error message:

error: type "mainClass" is not a direct base of "glavna"

This is the program I tried:

Code:
class mainClass {
private:
int x,y;

Code] ......

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C++ :: Derived Class Constructor Using Base Class Constructor?

Jan 1, 2013

Is this example correct? This example from a book

Constructor of the Base Class
Person::Person(char* n="", char* nat="U.S.A", int s=1)
{
name = n;
nationality = nat;
sex = s;
}

Constructor of the Derived Class (inherited from the base class)

Student(char* n, int s=0, char* i=""):
Person(n, s)

Why the initialized list of the base class constructor doesn't match the initialized list of the derived class constructor? I know this book is a little bit old, I'm not sure if this wrong in VC++ 2010?

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C++ :: How To Initialize Map Variables

Jul 8, 2014

How are map variables initialized?

PLEASE EXPLAIN THE FOLLOWING CODE TO ME?

// accessing mapped values
#include <iostream>
#include <map>
#include <string>
int main () {
std::map<std::string, int> mymap;

[Code]...

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C/C++ :: Possible To Initialize Char Value Into Int Value?

Oct 13, 2012

#include<stdio.h>
int main() {
    int j=printf("Hello.");
    return 0;
    exit(10);
}

In the above program is it possible to initialize int j with char value "Hello."?

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C++ :: How To Initialize QMap

Jun 2, 2014

How to initialize a QMap<QString,int> like following?

Code:

map<string, int> m = {{"aa", 1}, {"bb",2}};

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C :: How To Initialize Deck Of Card

Mar 25, 2014

The deck of cards so it is populated with all 52 cards. Once you have populated the deck, you need to shuffle the deck. Here is a simple algorithm you might consider for this purpose:

For each card up to the middle of the deck generate a random number modulus the size of the deck, swap the current card with the card at that location done

To implement this requirement you need to implement and use the following functions:

void initDeck(Card * deck);

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C++ :: Initialize A Matrix In While-loop?

Jun 21, 2013

I have written a program, in which I create a NxN-matrix. As I need some different samples (some different such NxN-matrices), I try to create a new matrix in each recall of a while-loop. The first recall of the while-loop works without any problems, but the second recall crashes, but I get any errors from the compiler. Here is my quell code. The problem should be with line 44:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

[Code].....

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