C/C++ :: How To Make A Linked List / Error - (current) Is Not Declared In This Scope
Feb 10, 2015
I am trying to make a linked list. When I compile my code, I get an error saying 'current' is not declared in this scope. I don't understand because I have declared in the first line of my functions body. The variable is local to the function so I don't understand what the problem is.
#include <iostream>
#include <cstdlib>
using namespace std;
class LinkedList {
public:
LinkedList() // default constructor makes an empty list
[code].....
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Oct 29, 2014
main.cpp
#include <iostream>
#include "sushi.h"
using namespace std;
int main()
{
do {
......sushi go;
......string x; <----------------------------Declared x here
......cout << "wanna use a banana?" << endl;
[Code ....
Error reads: 'x' was not declared in this scope.
How do I fix this?
P.S The sushi class does not matter, that is all perfect. Also, the dots are to represent my tabbing to make it easier to understand.
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Jan 27, 2014
I'm working through this neural network tutorial, unfortunately I get stuck trying to compile on line 28, saying "error: 'neuronNum' not declared in this scope." I seem to always get stuck on these kinds of errors, yet I don't understand because I though that the variable was declared and initialized within the for loop.
#include <iostream>
#include <vector>
using namespace std;
[Code]....
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Jan 28, 2014
I'm trying to make a dynamic 2d array of a Tile Object I created, the Dynamic 2d array was working when I tested it as an int array but not that I gave it a type of Tile it is giving me the above error. I'm reading values from a .txt .
tile Tile;
Tile **grid;
grid = new Tile*[a];
for (int i = 0; i < a; ++i) {
grid[i] = new Tile[b];
}
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May 13, 2014
I've got this sorting program that uses variables from another class but I'm not sure why its not recognizing it. I'm getting an error length and list not declared in this scope.
#include <iostream>
#include "arrayListType.h"
using namespace std;
template<class elemType>
class orderedArrayListType: public arrayListType<elemType> {
[Code] ....
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Feb 16, 2013
void search(int srch) {
if (isempty()) {
cout<<"No Record Found";
} else {
node *p;
p=head;
while(p!=NULL || p->getroll_no()==srch)
[Code] ....
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Jan 10, 2015
For some reason my compiler says "rename not declared in this scope" .... Isn't it declared in iostream? Or is rename only for C not C++? And if it is only for C how do I rename a file in C++ then?
#include <iostream>
#include <cstdlib>
using namespace std;
int main(int argc, char* argv[]){
char oldname[] = "RomeTW.exe";
[Code] .....
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May 20, 2013
I have this error - [Error] 'fprintf' was not declared in this scope (line 32)
and this - [Error] 'fclose' was not declared in this scope (line 33)
here's my code.........
1 #include <iostream>
2 using namespace std;
3 #include <windows.h>
4 #include <winuser.h>
5
6 int save (int key_stroke, char *file);
[Code] ......
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Mar 31, 2015
Code:
#include <iostream>
#include <vector>
#include <cmath>
#include "ANN.h"
using namespace std;
const int NUM_HIDDEN_NEURONS = 3;
[Code] ....
So I am getting 2 errors. Here is both of them.
ANN.cpp: In member function "void ANN::JustDoIt()":
ANN.cpp:36: error: "class std::vector<HiddenNeuron, std::allocator<HiddenNeuron> >" has no member named "SetWeights"
ANN.cpp: In member function "void ANN::SetData(double, double)":
ANN.cpp:85: error: "SetNeuronData" was not declared in this scope
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May 1, 2014
trying to use a void function below. How do I correct scope not declared for numYears and numChildren?
4#include <iostream>
5#include <cmath>
6using namespace std;
7
8// Function prototype
[code]....
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Apr 6, 2013
How can you make a linked list without having to write
node *head = NULL;
head = new node ( "zildjian" );
head->next = new node ("sabian");
head->next->next = new node ("paiste" );
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Apr 28, 2014
If I wanted an int connected to a float connected to a string connected to a POD, would all I have to do is :
Code:
template<class T, class X>
struct node {
T data;
node<X> *next;
};
Or would I be forced into using polymorphism?
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Jul 24, 2014
#include <iostream>
using namespace std;
struct node
{
[Code]....
How is this not working? just the add & display function.
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Oct 29, 2013
I have made a Template Class that I named ArrayList(to coincide with ArrayLists in Java)and it works for the primitive types string, int, double, etc.; however, when I try making the ArrayList with a class object instead of a primitive type it gives:
"error C2512: 'ArrayList<Missile>::listCell' : no appropriate default constructor available"
And I am not sure why. My ArrayList Class is defined by:
template <class type> class ArrayList{
struct listCell{
type dataStorage;
listCell *next = nullptr;
[Code] ....
The error takes place in the add method of the ArrayList class:
void add(type toAdd){
size++;
if (head == nullptr){
head = new listCell();
head->dataStorage = toAdd;
[Code] ....
only when I use a class object instead of a primitive storage type.
The class "Missile" has been defined and compiles successfully, and the code calling the add method is here:
ArrayList<Missile> missiles;
Missile *missile;
//Constructor and Deconstructor not shown
void fire(){
missile = new Missile(xPos, yPos, true);
missiles.add((*missile));
}
why this causes an error?
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May 30, 2013
I dynamically allocate a new list in the recMergeSort function which should run a constructor but when it get to the functions that use it, I get error C2065: 'otherHead' : undeclared identifier. I have tried setting it to NULL and it didn't work. I even copied the default constructor to a set function and I still get the errors.
Code:
template<class Type>
void unorderedLinkedList<Type>::recMergeSort(nodeType<Type>* &head) {
otherHead = new nodeType<Type>;
if (head !=NULL)
if (head->link != NULL)
[Code] ....
wonder if I'm sending the correct data type. Here is the heading of the functions that I'm using from the book.
Code:
void unorderedLinkedList<Type>::divideList(nodeType<Type>* first1,
nodeType<Type>* first2)
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May 15, 2013
When compiling the source I get the following error
"pms_program.h:54:56: error: expected declaration specifiers or ‘...’ before ‘CourseType’"
the code you are looking for in pms_course.h ( there is a circular dependency between pms.h , pms_course.h and pms_program.h)
function prototype AppendProgram ( part of doubly linked list )
I have attached the full course code.
As much as I like I cannot change the structure of the startup code ...
please see attached zip file for the entire source code.
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Oct 11, 2014
I'm trying to print a single linked list backward with functions/classes. I have created the main file and 3 header files. But I'm getting an error on one of the header files, linkedListIterator after adding #include "linkedListType.h". It says that "linkedLlistType.h" is calling itself. And when I try to run it, I get an error of "too many header files." I have tried changing the headers many times, but nothing seems to work.
.cpp file:
/*(Printing a single linked list backward) Include the functions reversePrint and recursiveReversePrint, as discussed in this chapter, in the class linkedListType. Also, write a program function to print a (single) linked list backward. (Use either the class unorderedLinkedList or the class orderedLinkedList to test your function.)*/
#include "linkedListType.h"
#include "orderedLinkedList.h"
#include "linkedListIterator.h"
#include <iostream>
using namespace std;
struct nodeType
[Code] ....
header files:
[URL] .... (error in this header file)
[URL] ....
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Sep 17, 2014
Why I am getting this error
error: variable or field createBinaryFile declared void
void createBinaryFile(std::fstream&, std::ifstream&);
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Oct 10, 2014
On running the following codes I'm getting these errors. I'm using Code Blocks 13.12
void view(string); //error: variable or field 'view' declared void & error: 'string' was not declared in this scope
void customer()
{
char ch;
[Code]....
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Jun 14, 2013
Are there any situations to explicitly use the scope resolution operator with global scope? I can imagine a situation like:
#include <cmath>
class IntWrapper{
public:
IntWrapper& pow(char);
IntWrapper(char);
private:
int m_int;
[Code] ....
But then I would think that the writer should have used a different name, and that using the scope resolution operator in the constructor body is still pointless...
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Apr 29, 2013
I'm trying to write a function that takes two linked lists and creates a third one with only the common elements.
It assumes the first list (the caller) has no dups, but it doesn't seem to be working. The program doesn't crash, it just hangs when it is supposed to display L3 (the third list)..everything else runs and is displayed fine.
template <typename T>
LList <T> LList <T>:: common (LList <T> &B)//common fct
{
Node <T> *hunter1 = Head;
[Code]......
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Jun 29, 2013
I have a linked list comprised of chars like so...
Code:
node1 - "p"
node2 - "o"
node3 - "p"
I need a function that will take in three perameters...node *replaceChar(node *head, char key, char *str)Stipulations of this function. head is the head of the list, 'key' and 'str' are guaranteed to contain alphanumeric characters only (A-Z, a-z, and 0-9). str can range from 1 to 1023 characters (inclusively). So if I call this function with these perameters..
Code:
node *head == /*the head of the list to be examined*/
char key == "p"char *str == "dog"The new list will look like this...
node1 - 'd'
node2 - 'o'
node3 - 'g'
node4 - 'o'
node5 - 'd'
node6 - 'o'
node7 - 'g'
All instances of 'p' were replaced with 'dog' I have a toString function which takes in a string and converts it to a linked list and returns the head. So assume that you can call the function on str = "dog" so...
Code:
toString(str) == /*this will return the head to the list made from the str*/
If it's unclear what my question is...I am stumped on how to write the replaceChar function the one that takes in three perameters..
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Jan 30, 2013
struct x
{
y *GetY(); //error: what is "y"?
struct y
{
};
};
Why does GetY have to be declared after struct y is declared? I thought order of class members in C++ did not matter? Does it have to do with the way parsing is done?
EDIT: It also doesn't work if I typename x::y *GetY();, which makes even less sense to me.
EDIT: It works if I forward declare, but this goes against everything I know about C++ classes...
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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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May 30, 2013
I'm working on a linked list and was wondering how this looks to everybody else for a deleteList function.
void deleteList(Node* head)
{
Node* iterator = head;
while (iterator != 0)
[code].....
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Mar 8, 2014
i want to make a function that returns a list of strings
i have this code in vb.net
Public Class Addonloader
Public Enum AddonType
IGraphicalAddon = 10
[Code]...
but when i try to debug it, i get this error
"Expected class, delegate, enum, interface, or struct"
and it underscores list <system.type>
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