C/C++ :: Making New Class Instance And Adding To Linked List
Oct 31, 2013
I have a .cpp file which contains 5 smaller defined classes. In my missile class I have a default constructor and a constructor that I invoke
class Missile{
private:
bool isHuman;
[Code]...
My issue is when creating and adding the pointer object; it doesn't seem to create a new instance of the class-the Missile objects all share the same xPos value which is always the first xPos when the "fire" command is given. The "Missile *missile = new Missile(xPos, yPos, true);" line does not seem to create a new instance of the object with different variables but instead creates a new object with the same variables. Is it necessary for me to always make a separate .cpp and .h file for any class I want to create multiple instances of or can I keep the smaller classes in the same file and still create a new separate instance of the class?
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Nov 24, 2014
I have a 2D array, array[20][3]. Each row represents a storm and each column represents month #, wind speed, and pressure in that order. This data is read from a file and auto-fills the array. I need to be able to give users the ability to add an additional storm or delete a storm. I know that a linked list would be the best approach but I'm not very familiar with linked lists.
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Dec 31, 2014
Code:
// Write a function called insertEntry() to insert a new entry into a linked list.
Have the procedure take as arguments a pointer to the list entry to be inserted (of type struct entry as defined in this chapter), and a pointer to an element in the list after which the new entry is to be inserted.
// The function dveloped in exercise 2 only inserts an element after an existing element in the list, thereby prenting you from inserting a new entry at the front of the list.
(Hint: Think about setting up a special structure to point to the beginning of the list.)
#include <stdio.h
struct entry1 {
int value;
struct entry1 *next;
};
[code]...
This is a working version of the exercise, but I don't think I'm doing what's asked. I was able to add an element to the beginning of the list using an if statement, not creating a special structure that points to the beginning of the list. How would I go about creating a special structure that points to the beginning of the list to add a new element at the beginning of the list?
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Jul 23, 2014
I wrote function to add to elements in the list, but when I call printList function it returns me empty list ! I'm new with linked list in C
Output:
Empty list
List is empty add element at the begining
New node with packet num 245
List is not empty add element at the end
New node with packet num 486
Linked list: Empty
Main:
Code:
int main(){
struct node * start ;
start = NULL;
int i;
/*Check if list is empty*/
if(start == NULL){
printf("Empty list
[Code]...
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Feb 17, 2013
I'm trying to make a function that lets me pass an index and a string and will insert the string at that index in the linkedlist..
Code:
typedef struct node {
char* value;
struct node* next;
}
[code].....
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Aug 18, 2013
I've been struggling with linked list for a few days. I've tried performing a few operations. Here is my code. the add_begin() function doesn't seem to work.
#include<iostream>
using namespace std;
struct node {
int data;
node *next;
[Code] .....
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Oct 17, 2014
Ok so I am having difficulty adding nodes to my linked list....
how to add a third node while keeping track of the address...Thats where I get lost..I don't know how to keep track of the addresses of the next node..
#include <iostream>
using namespace std;
typedef struct Node{
[Code]......
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Mar 6, 2015
I am having trouble adding a second node to a doubly linked list. I define my list as follows:
Code:
typedef struct Node {
char command[256];
int length;
struct Node *prev;
struct Node *next;
} userInput;
}
[code]...
Now, when I iterate back through my list (I want to start at the tail and work my way towards the head), I can only ever get the 1st node to print, then the 2nd node is garbage, which means, to me, that I've linked something wrong.
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Dec 2, 2014
Should my if statement be
if (tail== NULL) or if(tail->next == tail) ?
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Sep 22, 2014
I am currently trying to add to a linked list in sorted order but I have reached an impasse. I can get it to add in sorted order if it belongs in the beginning or second in the list. If i were to type in 9 then 4 i would get 49, but if i type in 5 it changes it to 559. I'm just at a loss and need some sort of direction.
#include "singly_linked_list.h"
#include <iostream>
using namespace std;
void add_node(node*& head_ptr, const int& payload){
if (head_ptr == nullptr) {
node* my_node = new node();
my_node->data = payload;
[Code]...
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Apr 19, 2014
I'm trying to make an templated class of List and trying to make a list of Students(another class) which I made. Its not working.
Code seems to work fine for pre-defined data types but it crashes when it comes to students. I also want to run sort function on list of students.
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Oct 6, 2013
I am making a simple program that is suppose to make a list of champions and their items from the game League of Legends. I am stuck on making a vector of the class so each slot within the vector would hold each champion and its data. This is what I got:
Champion_Info.h
#ifndef CHAMPION_INFO_H_INCLUDED
#define CHAMPION_INFO_H_INCLUDED
#include <vector>
#include <string>
using namespace std;
class Champ_Info
[Code] ....
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Oct 9, 2014
can we pass two linked lists as argument in a member function to add two linked lists? and how to access them both in the function??
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Mar 3, 2013
I am having a bit of difficulty with implementing an object oriented program that uses both linked lists and operator overloading. The program calls for adding and multiplying polynomials together, with each single polynomial being represented as a node of a linked list (which is further a data member of an object of a class I have defined to implement this program). For example:
polynomial A will be: 3x^4 // 1 node of a linked list
polynomial B will be: 5x^2 // 1 node of a linked list
polynomial C will be blank for the time being. // empty list
Now, I need to use operator overloading so that this following line of code can be implemented:
C = A + B;
C should now be: 3x^4 + 5x^2.
The checklist of which parts of my code that work:
constructor works;
copy constructor works;
destructor works;
operator= works;
print function needs work but i can worry about that later;
operator* work on later
Here is my code:
#include <iostream>
using namespace std;
struct termNode {
int exp; // exponent
int coef; // coefficient
termNode * next;
[Code] ....
For the time being I need to add multiple nodes together (with the result being in descending order). So for example:
polyType a(2,3), b(4,5), c(6,7), d;
d = a + b + c;
d.print(); // should print out 7x^6 + 5x^4 + 3x^2, but it will only print out: 3x^2 + 7x^6
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Jan 24, 2012
Hey I am trying to use the getline() function to read a line from a file. For some reason Visual Studio 2010 gives me the following error. "No instance of overloaded function "getline" matches the argument list". The piece of code that produces the error is in a class in a separate .h file and is executed as a method of the object. I'm almost certain it has something to do with either the compiler thinking I am calling another getline in a different namespace or my parameters for the function are incorrect. Here is the code:
Code:
#include <iostream>
#include <string>
#include <vector>
#include <fstream>
using namespace std;
class InsultGenerator
[Code] .....
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Mar 9, 2013
I'm trying to develop a program that stores a list of hw assignments in the form of "Date,Assignment name,grade". I have functions that add,remove, and delete from a list, but I would also like to search and delete a particular date found in the list. From here, split - Splitting a string in C++ - Stack Overflow I've tested Evan Teran's method to split a string, but I'm unsure of how to implement it in my code.
List.h Code: #ifndef LIST_H
#define LIST_H
#include <string>
using namespace std;
class List{
[Code] .....
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Apr 10, 2014
my data structures and algorithms professor gave us the following assignment. We are to reimpliment a class we wrote earlier in semester called sequence(which holds a sequence of floats) using a linked list. However I am having trouble with the class's copy constructor and assignment operator, specifically when the sequence is not empty.
links to google drive files
node
node header file
test program
sequence implmentation
sequence header file
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Mar 26, 2014
I am studying this sample code for linked list class node implementation. I am not 100% sure how this code keeps track of the head node. Here's what I know so far, and if you want to add/correct anything feel free to do so:
class Node {
public:
Node(); // constructor of class node without arguments
Node(int, Node*); //constructor with arguments of int type and a pointer node type
Node* next() const;
void setNext(Node*); //member fun, returning a pointer of node type
void setKey(int);
[Code] ......
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Dec 2, 2013
I am trying to implement a linked list using a class template, however each of my classes that I want in the list all inherit from an Account class. I have attempted to template the linked list class as account however Ive come into errors I can't resolve. How I can go about this?
The error exists within the customer.cpp class where it says
14IntelliSense: a value of type "Account *" cannot be assigned to an entity of type "CurrentAccount *"f:Further C++Assignment with TemplatesAssignmentCustomer.cpp229Assignment
Customer class:
#ifndef CUSTOMER_H
#define CUSTOMER_H
#include <iostream>
#include <string>
#include "Account.h"
#include "AccountLinkedList.h"
[Code] .....
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Aug 31, 2014
I am trying to write a program that will take a list of integers from a file and write them to another text file. I've been banging my head at this for days trying to get it to compile as it is riddled with linker and compiler errors.
**************************header*************************
#ifndef LINKEDLIST_H
#define LINKEDLIST_H
#include <iostream>
using namespace std;
template <class T>
class linkedList {
[Code] ....
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Jun 15, 2013
Well, basically, what I've been doing was creating a class that would implement the concept of Double Linked List, but that would behave like a queue ( the STL implementation is deque, or Double Ended Queue ).
The problem occured when I have been trying to generalize the class using templates. I mean, why use only integers ? Why not double or char or what not ?
Worked perfectly before including all the template stuff..
// Source.cpp <=> Main.cpp
#include <iostream>
#include "DList.h"
using namespace std;
int main(void) {
DList<int> *list;
list = new DList<int>();
[Code] .....
The errors returned by the compiler:
Error1error C2955: 'Node' : use of class template requires template argument listc:usersjumperdesktopc++ otherdouble linked listdouble linked listdlist.h6
Error2error C2955: 'Node' : use of class template requires template argument listc:usersjumperdesktopc++ otherdouble linked listdouble linked listdlist.h6
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Aug 6, 2014
I've written this class and struct to create a singly linked list. The data is stored in the binary file which I've opened and read. I'm trying to load said data into a class type array. The errors I'm getting are "incompatible types in assignment of 'StatehoodInfo' to char[3]" Lines 130-134 is what I was working on.
#include <iostream>
#include <iomanip>
#include <fstream>
#include <sstream>
#include <string>
#include <cstring> //For char[] string functions
[Code] .....
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Mar 1, 2013
I am facing a real-life problem, it can be simplified as below:
#include <iostream>
using namespace std;
class B;
class A {
public:
void f1(A a) {}
void f2(B b) {}
[Code]...
There is no problem at all with the f1(), it compiles and executes without any problem. But f2() gives compilation error. How to solve this?
The error message is: error: 'b' has incomplete type This is just to define the function f2() in a class, that uses an instance of its child class as one of its arguments.
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Mar 2, 2013
While writing a code for Blackjack game in the function which makes a standard deck i am getting this message "no instance of constructor matches the argument list" I am going to show my Card.h,Hand.h, Deck.h and Deck.cpp.
Card.h
//#ifndef CARD_H
//#define CARD_H
#include <iostream>
#include <string>
#include <algorithm>
#include <ctime>
#include <vector>
using namespace std;
[Code] ....
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Mar 20, 2014
I'm a little confused by my programming assignment this week. I've been working at it Wednesday and I've made progress but I'm still confused as to how I'm supposed to do this. The class I made is called Stack, and it's derived from a template class called StackADT. We also utilize a class called unorderedLinkedList, which is derived from a class called linkedList.
We're supposed to implement all of the virtual functions from stackADT in the Stack class. The Stack data is stored in a an unorderedLinkedList, so what I'm confused by is how to implement a few of the Stack functions because there are no functions in unorderedLinkedList which we could call to manipulate the data.
As you can see from my attached code, I'm really confused by how I'm supposed to implement the pop() and top() functions, and I also think my initializeList() function is wrong. We don't have any similar functions in unorderedLinkedList to call, so I'm at a loss of how i'd access my unorderedLinkedList. My initial thought was to call the similar functions in the class that unorderedLinkedList was derived from, linkedList, but I'm unsure of this is what we're supposed to do, or if theres actually a way to access my unorderedLinkedList without having to use the functions from the base class.
NOTE: We're not allowed to modify stackADT, unorderedLinkedList, and linkedList.
Stack.h
#include "stackADT.h"
#include "unorderedLinkedList.h"
template<class Type>
class Stack: public stackADT<Type>{
template <class T>
struct nodeType
{
T info;
nodeType<T> *link;
[Code]...
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Jul 3, 2014
There are two ways to access the members of class A inside class B:
1) Making an instance of class A in class B
2) Deriving class B from class A
So what is the basic difference in both ways as we can do same kind of work with both ways?
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