Below is a snippet of a class I am working on. My head is swimming, but I cannot understand why I am seeing the following error:
Quote
Error1 does not implement interface member 'System.ComponentModel.INotifyPropertyChanged.PropertyChanged'Medication.cs1011
I've been using a timer to refresh the listview on my application, but after half a second, I get the error message at first try/catch method in RefreshPlot() in PlotComponent.cs:
Quote An exception of type 'MySql.Data.MySqlClient.MySqlException' occurred in Marketplace.exe but was not handled in user code
Additional information: There is already an open DataReader associated with this Connection which must be closed first.
I am supposed to implement the member functions of class Person.
class Person {
public:
Person();
Person(string pname, int page);
void get_name() const;
void get_age() const;
[Code] ....
The code I wrote is below. Where I am struggling is the program does not allow me to input age. Therefore, I cannot test if my temp for age works. It automatically defaults to 0 because it hasn't taken input. Here is my code:
// Program Title: Person function
// Program Description: The program prompts the user for first and last name and age.
// It then prints the output that was provided by the user.
#include<iostream>
#include<string>
using namespace std;
class Person {
[Code] .....
I am having trouble compiling my interface. I am trying to store a reference variable as a member variable of the interface object. Compiler says that the variable has not be initiated correctly.
LCD inherits from VisualInterface which is expecting a DisplayDriver object to be passed in (DisplayDriver is another interface, but thats not important).
I pass the displayDriver object in when LCD is instantiated in maininterfaces.zip
I was pasing it before as a pointer but was told that this could cause me problems with memory leaks and a reference was better, but now I cant seem to get it to compile.
this is my header file
#ifndef Header_H
#define Header_H
#include <iostream>
#include <string>
using namespace std;
class CurrentAccount{
[Code] ....
The problem i m facing now is the CurrentAccount class display is showing error inherited member is not allowed....
template <class T>
void Arreglo<T> :: Registro (ifstream& Entrada) {
Entrada >> Cantidad;
Dealer = new T [Cantidad];
for (int i = 0; i < Cantidad; i++) {
[Code] .....
It says the following error when I comile it:
error: expected type-specifier before 'Detail'
(*(Dealer + i)).Modelo = new Detail[(*(Dealer + i)).AmountModels];
error: expected ';' before 'Detail'
Here in below code, the private data member is accessed directly using dot operator IN COPY CONSTRUCTOR and the program runs without error.
#include <cstdlib>
#include <iostream>
using namespace std;
class array {
int *p;
int size;
public:
array(int sz)
[code]....
Was missing the '.s'
I'm getting this error in the 'my_free' function here "bp->s.size += p->s.ptr->s.size;" and "p->s.size += bp->s.size;" here. This doesn't make sense to me because it seems to be the correct way to access the union, and In the "my_malloc" function I use a similar call "p->s.size = nunits;" and that works fine.
// gcc -o malloctest -Wall -g -ldl main.c
// ./malloctest
#include <stdbool.h>
[Code].....
I am working through these tutorials:
[URL]
I haven't had to modify them much for VS2010 so far. Right now, (I think) I have created the dialog box, and the menu as a class and a resource, respectively. However, when I call
Code:
void MFC_Tutorial_Window::OnClickDialogNew()
{
NewDialog dlg;
dlg.DoModal();
}
I get an error 'DoModal' : is not a member of 'NewDialog'
I suppose somehow I need to link the menu to the dialog box?
I believe I've added the references, included the libraries and essentially followed the instructions. Apparently I'm not very clear on how to make resources interact with new classes.
class CPop {
CBSVector<CTour> pop;
CBSVector<double> probability;
int popsize;
double TotalFitness;
CTour Elite;
CTspGAParams GAParameters;
}
error C2059: syntax error : 'constant'
error C2238: unexpected token(s) preceding ';'
I don't know y these errors, it runs fine in simple c++ environment
When I do this:
// header file:
#include <list>
using namespace std;
class myClass {
list<int> myMethod();
};
// cpp file:
list<int> myClass::myMethod() {
}
In the cpp file, 'myMethod' is underlined in red and when I hover over it, it says:
"std::list<int, std::allocator<int>> myClass::myMethod()
Error: declaration is incompatible with "<error-type> myClass::myMethod()""
But when I make it as a standalone function, outside a class, with no pre-declaration, there is no problem.
CODE:
class Secure {
private:
int seconds;
bool isRUNNING;
public:
Secure(int seconds) {
[Code] .....
ERROR:
error C2276: '&' : illegal operation on bound member function expression
I read that due to explicit casting, threads cannot be created within a class. I'm trying to thread a scanning system to relieve stress on my main program/module, rather than having the scanner stunt their performance.
In my project, GreedyKnap::calKnap(int nItem, int nCapacity, float fWeights, float fProfits);
This function include two array member pass as parameter. how can i do this?
I am modifying a set of static variables inside of the class's member function. The static variables are private. An example of what I'm doing is as below,
utilities.h
-----------
class utilities {
private:
static int num_nodes;
public:
void parse_details(char* );
[Code] ....
I get a compilation error in the function void utilities::parse_details(char* filename)
which says: undefined reference to `utilities::num_nodes'
compiler: g++
I have the following scenario: I plan to have an xml configuration file.I have a trader that lunch few strategies, each have different configurations. I plan to have all configuration reside in the same file as different nodes.
Now I want that each strategy will hard code the name of node it will loop up for its parameters. Since those paramters are requered for the init and I use DI (configuration are passed in the constructor) I want to make it static.
So this would be something like.
public class Strategy: Base_strategy{
public const string _conf_name = "XXX";
public static string get_conf_name(){
[Code]....
Since other people will code strategies, I want each strategy to implement this static function. I wanted to do this in an interface so that anyone coding new strategy,implementing the base strategy will have to code this static function as part of the contract.
I had a project to create an ATM with a database of 100 customers, i wasn't able to interface the real program with the database. I have submitted the project already. Here is the database and the ATM program
#include <stdio.h>
int main(void) {
int account, pin;
[Code]....
I am supposed to write a C program to send through USB interface to the analog device AD9914. Now I am doing the USB interface part where my computer has to detect the AD when it is plugged in and send the signals to it. I have to write the program to detect the device when it is plugged in. What kind of functions can I use? I know that the registry stores the device when it is plugged in. What functions are available to read?
View 2 Replies View RelatedI am not 100% confident that changing the existing interfaces will not be error-prone. Should I discard the new changes for ease of use or Adapt to new changes but having a higher risk of introducing new bugs?
old
Code:
///ContactResultCallback is used to report contact points
structContactResultCallback {
short intm_collisionFilterGroup;
short intm_collisionFilterMask;
[Code] ....
New:
Code:
///ContactResultCallback is used to report contact points
structContactResultCallback {
short intm_collisionFilterGroup;
short intm_collisionFilterMask;
[Code] ....
I want to track the mouse movement. I know that GTk+ provides some powerful libraries for creating GUI, that will, among other things, enable me to write handlers for mouse movement events, but I'm looking for a simpler, more compact capabilities for now.
Is there a low level C library that will enable me to interface with the mouse?
How can i create a graphical user interface using c
View 10 Replies View RelatedI need to create a C Wrapper around a C++_Class and in between needs to be an Interface-Class. The Interface-Class is needed, cause there are more C++_Classes which are kinda equal.
Hierarchicaly it would somehow look like this:
=> XY-Process which is calling the CWrapper
==> CMeasureWrapper.c// <-- CWrapper
===> CMeasureWrapper.h// <-- CWrapper Header
====> IMeasurement.h// <-- Interface-Class
=====> CMeasure.cpp// <-- C++_Class
======> CMeasure.h// <-- C++_Class-Header
My Output after compiling.(files will follow)
// CMeasureWrapper.c | CWrapper
#include "CMeasureWrapper.h"
uint32_t gu32_objectHandle;
uint32_t gu32_measureType;
int32_t addNewMeasureObject(uint32_t u32_measureObjType)
{
int32_t t_status = 0;
[Code]...
It's the first time i'll try to build an CWrapper or even a wrapper. So maybe the Project-Properties need to fit as well.
The project itself is called "Platform" with following settings in:
C/C++ -> Advanced -> Compile As -> "Compile as C++ Code (/TP)"
This property on the CMeasureWrapper.c is switched to:
C/C++ -> Advanced -> Compile As -> "Compile as C Code (/TC)" but only on this file!
I'm not sure if it's necessary, the file is of .c type, so I wasn't sure.
what I am doin wrong? Not just depending on the error output, I mean on the whole project. Is there anything else which will not work with such a combination of CWrapper, Interface and C++_Classes? If there are any questions, just throw them at me
I get the following error in XCode whenever I try to access the member I created 'randomGen' in a separate class in a different header file. I have made sure to include the header file and have tried to access it through an object.
This is the code I enter when trying to access the method from randomiser.h in main.cpp. It is also an overloaded function with doubles and integers:
RandomG randomiser;
randomiser.randomGen(); // 'Call to member function 'randomGen' is ambiguous'
This is the code inside randomiser.h:
#include <string>
#include <iostream>
using std::string;
using std::cout;
using std::endl;
class RandomG {
[Code] ....
This is the error inside xcode: [URL] ....
I have tried seperating the code for the functions in another class (main.cpp) and then running and it seems to works, so I'm not sure why I can't put everything in the .h file and then access it?
I would like it in a seperate file so it doesn't clutter my main. I am writing a game with SDL so that might be confusing and I would like the window to have a random title and other random properties, so it would be easier to use a function.
I develop add-ons for MS Flight Simulator and I use the poorly documented SDK for this. The SDK provides a .h file in which an interface class is defined (with pure virtual methods only), something like this:
Code:
class IPanelCCallback {
public:
virtual IPanelCCallback* QueryInterface (PCSTRINGZ pszInterface) = 0;
virtual bool ConvertStringToProperty (PCSTRINGZ keyword, SINT32* pID) = 0;
virtual bool ConvertPropertyToString (SINT32 id, PPCSTRINGZ pKeyword) = 0;
};
In my code, I use this interface like this:
Code:
IPanelCCallback* pCallBack = panel_get_registered_c_callback("fs9gps");
...
SINT32 id;
pCallBack->ConvertStringToProperty(propertyName, &id);
Everything works fine, but I don't understand why... I thought the linker would stop with an "undefined symbol" error because the IPanelCCallback methods, such as ConvertStringToProperty, are declared as pure virtual but defined nowhere, and I don't use any library for linking. With such an interface class, I thought I would have to defined a subclass of IPanelCCallback and define the ConvertStringToProperty method.
I'm gonna start a project for my own purpose. In my project I need to access GSM sim cards and send & receive messages through a PC interface. What kind of GSM Interface support for my Requirements and in feature may extend Requirements. what kind of programming language will be simple for write an pc interface to access that GSM interface device.
View 6 Replies View RelatedHow can I design an console app such that its menu's options are used by mouse or get highlighted and enterable by using arrow keys of keyboard???
View 4 Replies View RelatedI am having difficulty calling the constructor in interface portion of my program. I get the error: no matching function for call to ‘Node::Node(int, NULL)’ when I try to call it on line 26 within the main function.
code:
interface: [URL]
implementation: [URL]
main file: [URL]
