I've got a calendar in Form 1 in my code, and buttons in Form2. I need these buttons to send codes for this calendar in Form1. How may I make these work? My friend told me to do a function as a new class, but I'm not sure how can I do this.
View 5 RepliesI'm having with header files, specifically to do with the string data type. The objects work perfectly when I put them inside the .cpp but when I set it to include the exact same code in a .h, I get a string of error messages.
class Topic
{
private:
string NInfo, SInfo, EInfo, WInfo, Name ;
bool Quest ;
[code]....
The program i am trying to make is for practice of using switch. the idea is the user enters a number and the program will print a day of the week corresponding to said number.
the statement is not complete with all cases yet, but i dont want to write all of it until i am sure of it being correct.
errors when compiling (gcc) are as follows
1 warning and 3 errors generated.
Robins-MacBook-Air:array2 RDenton$ gcc array2.c
array2.c:26:9: warning: format string is not a string literal
(potentially insecure) [-Wformat-security]
printf(a[uservalue]);
[code]....
We have to make a function integrate to work with the other functions given. I had it working before but I would only get all -4 as my answers but only the first one should be -4. what should more or less be put in my integrate function?
#include <iostream>
using namespace std;
typedef double (*FUNC)(double, double, double) = (line, square, cube);
double integrate(double FUNC, double a, double b){
for(int i=0; i<a && i<b; i++){
FUNC = a-b;
[code]......
I have a WPF DataGrid with DataGridTemplateColumns, when I select rows and use Ctrl+C, and then in Excel or any document Ctrl+V, no data is pasted. If I change columns to DataGridTextColumn then copy and paste works fine. What can I do to make work copy & paste with DataGridTemplateColumn? Also when I set ClipboardContentBinding="{Binding FirstName}" for the template column, Null Refrence exception is thrown.
View 1 Replies View Relatedhow work backspace key in c++.i want to make a program which can work as a backspace number
View 1 Replies View RelatedI have to make a maze with arrays, but i cant seem to move down or up or at all. Here is what I have so far
#include <iostream>
#include <string>
#include <iomanip>
#include <fstream>
[Code].....
Can you take a look why I am getting compile error.
Code:
// clang++ main.cpp -g -std=c++11 -o main
#include <iostream>
class QuoteClass {
public:
QuoteClass() = default;
QuoteClass(std::string param) {symbol = param;}
std::string get_symbol() {return symbol;}
[Code] ....
I have a combobox with Items 1024
2048
4096
8192
String cach = form.comboCache.SelectedItem.ToString();
I am using the above code to retrive an item selected by user,But this line is giving an exception "Null Reference Exception, Object reference not set to an instance of an object"
I am trying to transfer information from form1 to form2 but it will not allow me to do so; I get an error when I write in the coding of
Form2 frm2 = new Form2();
frm2.FN.text = this.FirstName;
The error reads as "Form2 is inaccessible due to protection levels
I have looked over everything and I am pretty sure everything is set to public on both forms how do I fix this?
I have MdiForm and Form1 as a child Form1 has a menu 'mnuClear' Sub mnuClear_Click MdiForm a button Clear.
Can you click on the button from MdiForm call sub mnuClear_Click in Form1 Sub mnuClear uses local variables and can not be moved to the module ...
Is there a way to make an object rotate until it looks at the sprite?
View 1 Replies View RelatedHow to make an object wrap around the screen?
View 1 Replies View Relatedmake a class that you can make only one Object of it.
For example if you have Class A.
Let's say you create one object A* a=new A();
Now the next time you, try to create another object. For example:
A* b=new A(); What will happen is that b will get the same object (or reference) as a. In other words hey'll be pointing towards the same place. So basically you'll only have one object of it created. I tried doing it but I couldn't quite make it.
Here is what I tried: (but couldn't complete the exercise)
class God
{
public:
static int num;
static God* god;
[Code]....
What c++ code can be used to make an 'X' move through a maze. I have some code, but I'm not sure where to go from there. I have divided the program into three files, A header file, a main file and a .cpp implementation file.
In my implementation file I have:
#include "Maze.h"
Maze::Maze() {
} void Maze::mazeTraversal(char maze[][COLS], int row, int col, int direction) {
enum Direction {DOWN, RIGHT, UP, LEFT};
switch(option)
[Code] ....
how to structure my classes so that they all "wire together" and inherit the proper functions and data that I want them to. I want to have a Car.c and car.h which are "wired" with body.c/body.h, which in turn is wired with a frame.c/frame.h, wheel.c/wheel.h, and driver.c/driver.h.
Each part of the car holds some type of data, mostly ints: The car has a (total) mass and car_name. The body has a mass and color. The frame has a mass. The wheel(s) have a mass and force. [There will be 4 instances of wheel] The driver has a mass and driver_name. Each of these functionalities must come from their respective .c and .h files, and be amalgamated in the car.c and car.h (which should contain all the functionality of its parts). Then, in my main test program, I am to make an instance of car and hardcode in its values of: mass (which comes from the total mass of all of its parts, this is where i start to lose it.
How will I access its parts' masses in the test program?), color (a character array), current position (an integer), current velocity (an integer), and current acceleration (which comes from the total newton force of the 4 wheels, again this is where I start to get very confused). (Then in the test program I am to print out a simulation of this car over a period of 100 seconds, and show its position, velocity, and acceleration at each point (based on the mass, total newton force, and starting position). This part is of course a simple while loop, and is somewhat trivial.)
From what I understand, I will need to allocate memory for all of the data each class holds. Then, using function pointers, as well as #include "X.h" , I will need to somehow link up all of the classes together so that car has access to all of the parts' functions which set, for example, the newton force of each wheel.
We have learned a slight bit about structs, malloc, sizeof, and pointers, but I have not used them to link functionality or data from separate classes together.
How we can make another thread sleeping ?
As you know, Thread.Sleep(Timespan) function makes the current thread sleeping, but i want to make a specific thread sleeping.
Is there any way or trick to make a program that executes without using any class or class concept
View 4 Replies View Relatedhow to make write xml continuous from port COM. Port my COM receive data continuously from external hardware and now I want to record continuous data into xml file (overwrite)
View 1 Replies View RelatedI want to make an object, which moves from x1,y1 to x2,y2 in a straight line, also make a sinus over the line (so the x,0 is the line itself, and cux,cury is the object. So the object will move as a sinus over the line. How do I do this in c++?
View 3 Replies View RelatedIn a project I'm building I have 4 datagrids which I'm using and where I'm updating information manually, so not from a database or a list.
Now to make it a bit easier I would like to use one generic sort of variable to prevent having to write the same code 4 times.
So if I have 4 datagridviews DataGrid1 through DataGrid4 I would like to be able to assign one of those Datagridview to a general object that has all of the properties and methods in it.
I was thinking of using something like this:
object DataGrid = DataGrid1
DataGrid.Rows.Add("INFO");
But that doesn't work.
i want make a setup for C# program with SQL data base but i can not . i use installshield but i have error in connection to database in execution program.
View 32 Replies View RelatedI want to make such application in which user make directed graphs along with relations between them. After that application show that which graph properties are proved in this graph e.g Reflexive, Irreflexive, Symmetric, Anti Symmetric, transitive etc
View 1 Replies View RelatedI have three tables (company,department and employee). Company table has two rows (CompanyID, CompanyName). Department table has four rows (DeptID, DeptName, CompanyID, EmpID). Employee table has three rows (EmpID, EmpName, EmpAddress).
I want to search by Departments For example I want to have one Checkbox named Department if I checked Department it should show me all the available departments in the Company so if i select a particular department it should show me all the employees that they belong to the department that has been selected.
Following is my xml file called PropertyInfo.xml :-
<?xml version="1.0" encoding="utf-8" ?>
<PropertyInformation>
<locations>
<location name="Bombay">
[Code].....
In above LoadPropertyInfo() method, how to cast DataSet to List<Location> locations before returning "locations" ?
I am busy with a project, it is going to consist out of 3 different windows which is logic enough for this whole code to be interactive.
It must be able to pull data into a windows form, displaying it into a textbox, and when you click on the textbox it needs to open up another window where you will have a windows form that will display data as the code loops through the questions in the database.
I am not sure how to push the data that has been selected on the database to the next window..
Here is my code for the first window:
;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form {
//SqlConnection myConnection = new SqlConnection("Data Source=(local);Initial Catalog=KnowledgeEssentials;Integrated Security=SSPI");
//int intType = 0;
public Form1()
[code].....
With the second window the data in the table needs to be displayed and each row from the table needs to have a checkbox next to them, so that if the check box is checked, the relevant information of the checked row will show up in the 3rd window... so MY question is, HOW do I pull that data from that specific database and let it show in the listcheckbox?