C :: System Call For A Pause Function

Jan 20, 2014

I know there has to be a system call for a pause function. I simply want the program to pause for a few seconds before executing the next line of code. I do NOT want the user to enter a keypress, just pause the output or code execution for a few seconds.

system (pause); waits for keypress right? I just want it to wait 3 seconds before proceeding. I know it should take an argument for milliseconds right? Also, this is for a homework assignment I have already completed, just doll'in it up a bit for extra credit...maybe...

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C :: System Call To Pause Execution Of Program For Few Seconds

Feb 2, 2014

I know there has to be a system call to pause (not system("pause") execution of a program for a few seconds. I would like to give the illusion that my program is 'thinking' rather than just spit out the result as soon as the user has hit the enter key.

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C++ :: System (PAUSE) Without Message Or Button Press

Nov 7, 2013

I would like to have my program pause at a certain screen but not to have the "Press any key to continue..." message or the press of a button. In my program, the code looks similar to this:

for(;;)
{
cout
cin
cout
cin
...
//

here, I want to have a pause to view what the for loop has come up with but to not have a message display or a button press needed. At the end of the loop, I want it to pause before looping again. IS this possible?

If so, how can I implement it into my program?

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C++ :: Add Small Function To Allow To Pause Game?

Dec 4, 2013

I am trying to add a small function to allow me to pause the game I am making. I measure the time elapsed using the following algorithm:

1. USE ""clock_t begin=clock();"" FOR SYSTEM TIME OF GAME BEGINNING.
2. USE ""cout<<(clock()-begin)/CLOCKS_PER_SEC;"" TO DISPLAY TIME ELAPSED IN SECONDS.

Now, if I want to pause, I would want to subtract the 'paused' time from the total time elapsed.Say,

clock_t pause, resume;
{
pause=clock();
.
.
.
resume=clock();
}

Then I would do cout<<(clock()-begin-(resume-pause))/CLOCKS_PER_SEC;

This, though is what I want, works only once(I can pause only once). I can use arrays of resume and pause, but it would still limit the number of times I can pause.

What I am looking for is a way to pause any number of times.

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C++ :: Call A Program By System

Apr 17, 2013

So I know that I can call a program by system("prog.exe"), but what do I add in when I want to pass a parameter?

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C :: Assign System Call To Variable

Feb 22, 2014

I have to ask system (linux) for a value and then assign it to the variable.

Example:

unsigned char date[] = system("date");

Of course this is wrong, but illustrated what is my goal.

How to achieve this effect ? I've heard about POSIX but how to include and use it.

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C/C++ :: System Call A Command From Within A Program?

Sep 17, 2014

how to invoke a UNIX command within a program

I found this:

dd if=/dev/urandom of=myrandom bs=100 count=1

and I found this:

dd if=/dev/zero of=mytestfile.out bs=1 count=0 seek=1G

I want to call this command, by using the command line and typing Generate or something to that effect.

Basically, I want to be able to build random size files, content isn't important to me at this time.

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C :: Program To Check For Running Pid Using System Call In UNIX / Linux

Dec 11, 2013

I have written a program which uses a pid to check if the process is currently running and return a value based on the system call result.But the program core dumps

Code:

#include <stdio.h>
#include <string.h
int main( argc, argv )
int argc;
char * argv[];
{
int p_pid = 99;
char buff[1000];
}

[code]....

What is the mistake in this code and is it portable in both unix/linux , is the method secure (grepping for program name )?

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C++ :: What Is Function Call Overhead And Function Call Stack

Apr 25, 2014

What is Function call Overhead and Function Call Stack?

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C++ :: Syntax Error In Function Call - Type Mismatch In Parameter In Function Sort

Jul 6, 2014

error says "cannot convert 'int*' to 'int' in function main()
and also
type mismatch in parameter in function sort(int,int)

Heres the code:
#include<iostream.h>
#include<conio.h>
void main() {
void sort(int,int);
clrscr();

[Code] .....

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Visual C++ :: Error C3867 Function Call Missing Argument List For Calling Thread Function

Mar 19, 2013

I searched the web for error: C3867... and the discussions where murky or obscure.

My code excerpt is:

#pragma once
#include <windows.h>
#include <stdlib.h>
#include <process.h>
void PutUpfrmIO(void *);
namespace WordParsor {

[Code] .....

I get the generic message:

error C3867: 'WordParsor::Form1::PutUpfrmIO': function call missing argument list; use '&WordParsor::Form1::PutUpfrmIO' to create a pointer to memberc:userskingc++wordparsorwordparsorForm1.h... and the suggestion fix generate another error.

One person suggested the gcroot<> object wrapper... but I do not know how to modify/declair the function or its argument type.

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C++ :: How To Pause After Outputting Results

Feb 19, 2013

I mean on the executable file. It just displays the results and quickly flashes away, cin.get() has no effect and system("PAUSE") is undeclared.

I never found a single sure way to pause effectively. Is there a method that works all the time? Sometimes cin.get() gets skipped even in the code itself. The IDE I am using is Code Blocks if that matters any.

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C++ :: How To Pause Program Until File Changes Are Made

Oct 2, 2013

I want to monitor a text file. So far what I have is the program reads and prints the names in the file to standard out. When the program reaches the end of the file, it closes.

I want the program to stay active and continue to print names as they are saved to the text file.

I was toying with FindFirstChangeNotification function, but it seems that returns a handle so I'm back to the drawing board.

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C :: Using Prototype Functions To Run Loops And To Pause The Program?

Oct 25, 2013

So i have to use these prototype functions to run loops and to pause the program, the only problem is after i select a loop option and enter a number of dots to print in the loop it goes into an infinite loop and why, also when i try using the 4 option to exit it still asks me how many dots i want to print.

Code:
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int pause(char *);
int getInt(char *);
void whileFunction(int);
void doWhileFunction(int);
void forFunction(int);

[Code] .....

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Visual C++ :: How To Use 2 Command In System Function

Feb 7, 2013

I want to run Unhidden.exe in drive N: and send char to that program. I use function like this

Code:
system("N:/Unhidden.exe");

It can open Unhidden.exe but it run in visual studio 2010Projects . I try to use command N: and Unhidden.exe in cmd it can run in drive N: . So I try to use function like this

system("N:");
system("Unhidden.exe");

but it not found Unhidden.exe . How to use 2 command in sytem() function ?

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Visual C++ :: Blocking Keyboard Play / Pause Button In Windows 8?

Mar 27, 2014

I am writing an application that needs to temporarily disable the Play/Pause button that appears on multimedia keyboards.

Normally, a key can be blocked quite easily by installing a low level keyboard hook (WH_KEYBOARD_LL) where the KeyboardProc intercepts the key (in this case VK_MEDIA_PLAY_PAUSE) and returns a "1" instead of calling CallNextHookEx. I have tried this with other keys (including the Windows key VK_LWIN) and this works perfectly. I also have no problems with this method under Windows 7 where all keys, including VK_MEDIA_PLAY_PAUSE get blocked.

Windows 8 is a different story. When my application has input focus, everything works as expected, meaning the VK_MEDIA_PLAY_PAUSE key gets blocked and no other application responds to it. However, when my application loses focus, my hook procedure gets called (this was verified by sending out a OutputDebugString) but other applications respond to key even though I return a "1". As soon as my app gets focus again, everything is block as it should.

After some investigation, I found that the multimedia keys not only generate keystrokes but also generate WM_APPCOMMAND messages so I added ShellProc (WH_SHELL) hook with the following hook procedure:

LRESULT __declspec(dllexport)__stdcall CALLBACK ShellProc(int nCode,WPARAM wParam,LPARAM lParam) {
// Do we have to handle this message?
if (nCode == HSHELL_APPCOMMAND) {
OutputDebugStringX(">>>>> HSHELL_APPCOMMAND");

[code]....

This procedure is only getting called when my app has input focus. Whenever I have input focus and return "1" the Play/Pause command gets blocked. As soon as I lose focus the procedure does not get called/hooked.

As I have mentioned, the code works for other keys, just not the multimedia keys.

Alternatively, another way of blocking the multimedia keyboards Play/Pause button?

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C/C++ :: Write Function For Destruction Of Planetary System Solid

Dec 18, 2014

I have to write a function for the destruction of the planetary system "solid". With the destruction of the planetary system, the asteroids where the gap between this one and the object, is smaller that "gap" will also be destructed. (so, they have to be deleted) The asteroids for which the gap is greater are converted to free-floating planets so they have to be inserted into the tree of free-floating planets. The total cost of the transport of all the asteroids that are converted into free-floating planets in the tree of free-floating planets should be $O(n)$, where $n$ is the maximal between the elements of the tree of free-floating planets of the star system to which the object belongs and the elements of the tree of asteroids of the planetary system of which the object has identifier "solid". The field "gap" of the new tree should have the value $0$. The destructed planetary system should be deleted from the list of planetary systems of the star system to which it belonged. (The tree of free-floating planets is not a binary search tree)

I have done the following: [URL]

Is the way I deleted the nodes correct??

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C++ :: Program For Billing System - Regular Package Function

Jan 5, 2015

I have programmed a program for billing system. I have used parameters and arrays. All the functions are working except a one function. (Regular package function).

#include <iostream>
#include <fstream>
#include <string>
#include <ctime>
using namespace std;
void main(int &minutes, int &minutesd,int &minutesn) {

[Code] .....

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Visual C++ :: How To Modify System Menu To Execute A Function

Feb 11, 2013

I wish to add the item 'Website' to an MFC Dialog app System Menu so that it can activate the following method:

Code:
void CMyDlg::OnWebpage()
{
ShellExecute( NULL, NULL, _T("[URL]..."), NULL, NULL, 0 );
}// OnWebpage()
I have tried this:

Code:

#define IDM_WEBSITE (WM_USER + 101)
//..
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
pSysMenu->AppendMenuW(MF_STRING, IDM_WEBSITE, _T("Website"));
}

[Code]...

The code compiles without error but and the 'website' item appears on the System Menu but it doesnt do anything.

I've inspected the following but don't really understand how it works and it seems to me there should be a simpler way to accomplish my end.

Modifying the System Menu By John Simmons 26 Jan 2007 [URL]....

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Visual C++ :: System Function Fails To Parse Argument

Apr 29, 2014

I have a very strange problem with the system() function (on XP).

I have the following code:

Code:
char *text1 = ""A SpaceAction.bat" fred";
char *text2 = ""A SpaceAction.bat" "fred"";
int main(int argc, char *argv[]) {
printf("%s
", text1);

[Code] .....

When I run it where "A Space" is a directory with a space in the name, this is the result:

Code:
"A SpaceAction.bat" fred

F:Test>echo Testing
Testing
"A SpaceAction.bat" "fred"

'A' is not recognized as an internal or external command, operable program or batch file.

It seems that the double quotes round an argument make the parsing of the command fail.

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C++ :: Call Of Non Function

Jan 9, 2015

I have decalred a password function which accepts an array as parameter but while compiling, it's showing an error wherever I have called it.

void password(char a[100])
{
if(::q==1) { cout<<"
Enter the master password : "; goto ENTER; }

[Code]....

Wherever I have called this function it's showing an error: "Call of nonfunction." One of the examples of the errors is below:

::q=1;
password(master_password);
//Both 'q' and 'master_password' being global variables, and master_password being array of size 25.

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C/C++ :: Can't Call A Function

Jan 12, 2015

I wrote a program which detects a pattern in an array then returns a valve (x) for each time it does. now i tried to call function patt in main so that i can print x but it doesn't let me do it.

#include <stdio.h>
int patt(const int SIZE, char str[], int i, int c);
int main(void) {
const int SIZE=21;
char str[SIZE]={'1', '0', '1', '1', '0', '0', '1', '0', '1', '0', '1', '0', '0', '0', '1', '0', '1', '1', '0', '1'};
int i, c=0;

[code].....

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C/C++ :: What Is The Call By Value In Function

Mar 5, 2013

what is the call by value in function??

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C/C++ :: Booking System - Comparing 2 Char Variables In Check Function

Aug 31, 2014

I had problem in comparing 2 char vairable in check function

if(room_no==r)

variable r take input from user and compare to room_no read from file.

#include<iostream>
#include<conio.h>
#include<fstream>
#include<stdio.h>
#include<dos.h>
#include<string>
#include<stdlib.h>

[Code] .....

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C++ :: Call Of Non-function In Function Main

Feb 16, 2013

I am getting call of nonfunction in function main <> error and 's' is assigned a value that is never used in the function warning...

#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main() {
float a,b,c,s,area;

[Code] ....

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C++ :: No Matching Function For Call

Mar 5, 2013

This is the error I keep getting, but I'm not sure how to resolve it.

assignment7.cpp:11: error: no matching function for call to 'Time::display() '

Time.h:18: note: candidates are: void Time::display(int, int)

Code:
#include "Time.h"
int main() {
Time tm;
tm.set(12,53);
dt.display(); //Should display 7/4/1776

[Code] .....

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