C++ :: Stopping Codes With A Key Press
Feb 25, 2013
I have a program that I made, which does a list of stuff, then checks if a key is pressed, and if it's pressed, stop the looping.
The problem is, it checks if the key is pressed once a loop, which means that if the list has delays, you have to hold the button down for a while (depending on the list).
Here's an example:
Move mouse;
Pause program for 2 seconds;
Move mouse;
Pause program for 2 seconds;
Check if key is pressed;
What ways can I fix this problem?
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Sep 19, 2014
Now i am utilizing vectors in my codes.If i want to make a vector and i use #define to put a limit on the amount of variables it can contain. Until now i can do that. But let's suppose that i put 40 variables as its max capacity, but an user just needs to use only 12 or 14 variables. Put a rule that if someone has finished inserting his data and he is yet to fill the whole capacity of the vector the code.As to say : "If case you want to end press 0" .Edited : My computer has windows 7 and i took Codeblocks as my editor.
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Apr 6, 2014
I have a C program where I rapprendentare a table using a 10x10 matrix and create the chart with the game piece and the matrix in a spiral. I do not know how to start or even how to create the table with the ascii codes. is a task for school and I need to do it soon.
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Apr 20, 2014
this is my original code:
#include <iostream>
#include<fstream>
#include <string>
using namespace std;
string display(string);
main() {
[code]....
here is what it does;it reads from a text file and converts the characters to ascii numbers and stores them in 1D array.what I am trying to is storing these ascii codes in 2D array.
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Mar 25, 2015
I'm trying to write a lot of sample code to practice but I can not figure out how to take a string and sort each character in order of their increasing ASCII codes. I'm getting stuck trying to separate each letter to determine it's ASCII code. I know I have to use an array somehow, So far, this is my code:
#include <stdio.h>
#include <stdlib.h>
#define _CRT_SECURE_NO_WARNINGS
[Code].....
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Jul 17, 2013
I am trying to store the HTML codes for different characters in an array, but I am not sure how to do this, so that when using the keybd_event it can be plugged in.
If you try to do it with a string for storing the HTML code, you get this error.
string HTML[1];
HTML[0] = "A"; //A
keybd_event(HTML[0], 0, 0, 0);
I could do it in a very long if/else statement, but this would be much easier to call and get data from, and take up less space.
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Mar 22, 2013
I wanted to input some numbers with scanf function, i can enter some numbers and if I input -1 to the scanf, the input must end. And the scanf function has limited input, the max that I can input is 40 numbers.example if enter 1 2 4 6 5 4 -1 the scanf function will ended and the result will be appear.I wanted to know how the scanf function is like that would be best for this problem, Code: scanf("%d", &n); the result if I input those number will be like
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||||
||||||
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Aug 31, 2014
Here's my code,
#include <iostream>
#include <unistd.h>
#include <thread>
using namespace std;
void Blink();
[Code] .....
The problem is i don't want to use local vars , is ther anyway do end the loop safely(removing all the vars used in function and etc) without using a local var ?
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Feb 20, 2013
The code below gives me the maximum odd number and the minimum even number of a list of numbers that the user type. However, for the loop to stop the user needs to type 1000. Is there a better way (without having to have a "stopping" number, just in case I need this number to be somewhere on the list) to get the same results?
Code:
#include <iostream>
#include <iomanip>
#include <cmath>
#include <string>
using namespace std;
int main() {
int x, maxi, mini;
[code]...
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Oct 21, 2013
How to use c programming codes or batch operating codes to access files from our computer.
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Feb 10, 2015
I want to define a range of exit codes in my application. These codes will be used as a return value of ExitInstance function. I want to know the exit codes availables (values not used for example by windows to inform about an other error). When I force to crash my application, I get some different error codes: 8148, 10176.
What is the no available range exit codes?
Is this the ranges code unavailable?
[URL]
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Jun 6, 2014
Write a program that reads numbers from cin and then sums them, stopping when 0 has been entered. Add the following to your program:
-A counter within the while loop that keeps track of the number of inputs entered.
-A comment that determines if the total value is less than 100 or greater than 100, as in the sample output
-Switch statements to determine the total number of inputs
Sample output:
Enter numbers, one per line. Enter 0 to end:
7
8
6
5
5
9
8
0
The total was 48.
The total number of inputs read is 8.
The total is less than 100.
The code that I've got so far lets me keep track of the inputs entered, and displays the total of the values, but I'm not sure how to do the part where it determines if the value is greater or less than 100.
#include <iostream>
using namespace std;
int main() {
int val, total=0;
int i=0;
cout << "Enter numbers, one per line. Enter 0 to end:
";
[Code] .....
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Dec 1, 2014
So, I'm going to write a recursive function for a asterisk pattern but I'm stuck figuring out how to create a stopping case for it, better yet, I'm unable to describe the pattern completely.
*
**
-*
****
--*
--**
---*
********
-----*
-----**
------*
-----****
-------*
-------**
--------*
( - represent white spaces )
What I've been thinking:
* Every odd row has 1 * with 1 incremented white space
* Every "pair" of asterisks equals 8 total (EX. 8 one pair *'s, 4 two pair *'s, 2 four pair *'s)
Unfortunately, that's all I got. how I can represent this as I function. Once I figure out what my stopping case should be, I think I can do the coding on my own.
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Jul 9, 2012
how do I stop and restart a Thread in C# once it reaches a certain location on a form then restart the thread once it goes outside of the location boundries?
I am trying to stop an animation thread (a bullet) once it reaches a block on a panel.
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Feb 24, 2013
I run the program with gdb , i searched but find nothing about how i could run gdb , that shows what line of code is running constantly (i rather it also shows value of the variable on each line if it's possible ) without stopping (i mean i don't want to enter "step" every time , i just need to run the program with debugger and shows line of the code is running (without need to enter step each time by myself)is it possible? if yes , what command is needed to start gdb for this purpose?
P.S: for this purpose if i have to set breakpint i will. but even i rather not set breakpoint , i rather gdb while running the program shows what line is now executing (rather with the value of variabels).
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Mar 2, 2014
I've been working on this project which inserts data for different types of books lately, and I'm trying to utilize inheritance and polymorphism. The issue I've been having is after I create an object with my MediaFactory, I go to insert data into that type of object, but it won't reach the correct child class. The parent class in this case is MediaData. The class I'm trying to reach is Childrens, and the class that falls in between is called Book. The function I'm calling to insert the information is setData(ifstream&). This function simply places the information from a txt file into an object with the insertion operator.
Right now the program runs into the setData function of Book instead of Childrens. I need Childrens so I can enter all the required attributes (title,author,year). The call to this function is in MediaManager through the function called buildMedia, and my test is running into the case if (type == 'Y'). From there a pointer of type MediaData is created and pointed to a new object returned of type Childrens. I'm using my debugger in Xcode which does show that the correct object type (Childrens) was created.
I've tried a couple things so far. First I created another function called getData. From there I passed in *media and infile (txt input file) into that function, which then passed it right into setData with a pointer to the object and infile in the parameter. That didn't work, so I also tried going back into Childrens and removing MediaData from all my virtual functions and replacing it with Book. I got the same result when that happened; It morphed into Book class instead.
I have a portion of my UML as a reference. Childrens is a Book; Book is a MediaData. I also included all code for MediaManager, MediaHash, MediaFactory, MediaData, Book, and Childrens.
I did not include the operator overloads in the .cpp files to eliminate some redundancy.
//-----------------------------------------------------------------------------
// MediaManager.h
// Manager class for MediaData type objects
//-----------------------------------------------------------------------------
#ifndef MediaManager_H
#define MediaManager_H
#include "MediaHash.h"
#include "MediaFactory.h"
#include "MediaData.h"
using namespace std;
class MediaManager {
[Code] ....
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Nov 11, 2014
I'm working on coding a game of pong that allows players to play until one reaches a score of 10. Once the winning score is reached I want to display a "Game Over" message stating which player won. The game works perfectly except for stopping when the winning score is reached.
Here is the code I have so far:
//pongTest.cpp
#include "stdafx.h"
#include <string>
#include <Windows.h>
#include <iostream>
#include <conio.h>
#include <sstream>
#include <math.h>
#include <glgl.h>
#include <glglu.h>
#include "GL/freeglut.h"
[Code] ....
Not sure if my gameOver() function just isn't written properly, I'm not calling it properly, or a mixture of both.
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Mar 26, 2014
#include <iostream>
#include <windows.h>
#include <conio.h>
#include <ctype.h>
[Code]....
When I press the up key it will not display anything.
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Jan 3, 2014
When you press a key it automatically delays a bit then starts repeating without delay.
The second key pressed action comes with a delay and i want it to start repeating without delay. And could not find anything useful.
I might not be able to tell what i want exactly. Ok press simply a key and don't release it in a text editor. You will realize a delay at second character showing up.
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Mar 28, 2015
I already tried getchar(); but it doesn't worked the program skips this command
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Jun 8, 2014
I am altering this program to include some alterations for a class. When I run it with start without debugging, it just skips to press any key to continue. It will not display the cout << "Volume of box1 = " <<boxVolume1.
#include "stdafx.h"
#include <iostream>
using std::cout;
using std::endl;
class CBox {
public:
double m_Length;
double m_Width;
[Code] .....
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Apr 13, 2014
How can i jump from textBox to next texBox when i press enterKey in c# , what i the event for that .....
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Apr 13, 2014
I have a problem where I need to add the ability to input numbers into a calculator program through either a form button press or keyboard press. I have the button press working fine though I can't seem to get the program to start with the cursor active in the textbox for keyboard input. I've use this.ActiveControl = result; "result" being the textbox. Though the issue here is the program starts off with the cursor active but only for the first instance of keyboard inputs.
Perhaps its the way I wrote the program but is there a way I can achieve this? I found a way to write this calc by having a single event for all button presses, opposed from an event for 1-9. Not sure if this is a good approach but here is some of the code.
private double num = 0;
private string calculate;
bool pressed = false;
private void button_Click(object sender, EventArgs e) {
if ((result.Text == "0")||(pressed == true)) {
[Code] ....
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May 13, 2012
I'm trying to implement this on ubuntu, to compile and run only under ubuntu.
I found 100s of other attempts at answering the general question of arrow key press in c++. Nothing solid.
Some recommend using the Readline for the functionality I am trying to implement, but I need to stay clear of GNU licences if I can for this project. And some tips only work on projects for windows machines... for example the conio library.
For linux there may be the option of using the ncurses library which I will take a look at, but I am stubborn and want to implement this myself. It should be an easy straight forward thing to do, which is why I am a bit frustrated at the moment.
Here is my test code so far.
#include <iostream>
#include <sstream>
#include <stdio.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
using namespace std;
int main(void) {
char a;
stringstream ss;
string s;
[Code] ....
So! This works... 80% of the problem is solved. If you compile this, g++ under linux, ubuntu in my case, and run. Each keystroke reveals the correct key numbers.
q=113
w=119
when I click on the up key I get,
up = 279165
I thought, I can use this number is a if(int == '279165') to detect the up key.
I was not so lucky... this int is not behaving like an int!
So I modified the code to see it I could carry out an int operation on this number.
I added a 100000 to int i.
cout<< i + 100000;
Code:
#include <iostream>
#include <sstream>
#include <stdio.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
using namespace std;
int main(void) {
char a;
stringstream ss;
string s;
[Code] .....
Compiling and running this, and pressing the UP key gives the following number.
100027100091100065
Some some sort of array, something like, [27][91][65].
I tried all ways to access these individual numbers, actually the third one for comparison purposes, but no luck.
For completeness sake I list the other arrows.
UP = [27][91][65]
DOWN = [27][91][66]
LEFT = [27][91][68]
RIGHT = [27][91][67]
A little further digging shows that these numbers are derived from the representation of a "multi-char" constant, the data type given when pressing special characters...
Now here is the main problem I have, I can find ANY decent documentation on how to handle and play with "multi-char" .
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Apr 20, 2015
My problem is , i want to make a simple calculator , in the console i want afterall the user to choose what type of operation he want pressing a key like i mentioned in the title the keys would be F1,F2,F3 , i'm not finding in the internet the code to the detection of a press key like what i want.
Code:
#include <iostream>
using namespace std;
int F1 (int x, int y) {
cout << "Enter a number: " << endl;
cin >> x;
[Code] ....
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Dec 28, 2013
I would like to know how to press a key as if it had been pressed on the keyboard in a program. I would also like to know how to read input from a xbox 360 controller. I want to know how to do this so that I can add joystick support to a few mmos that I play that do not already have it.
BTW I am using C 99
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