C# :: Using Pre-defined Variables In Process Arguments

Sep 8, 2014

I have struck with issue regarding process arguments

Part of my code below:

ProcessStartInfo info = new ProcessStartInfo();
info.FileName = MsiTran;
[b]info.Arguments = "-a """ + MSTpath + "" " + MSIpath"";[/b]
MSIpath and MSTpath are already defined string variables.

I get error: only assignment call increment decrement .....can be used as statement

How can setup my arguments to cal the pre-defined variables.

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C++ :: Are Variables Being Defined As Parameters Separated By Comma

Jan 18, 2013

TinyGPS::TinyGPS()
: _time(GPS_INVALID_TIME)
, _date(GPS_INVALID_DATE)
, _latitude(GPS_INVALID_ANGLE)

[code]....

I am wondering about the constructor. I see there appears to be nothing inside of TinyGPS::TinyGPS() as far as parameters go and that that declaration is followed by a ":". First I'm wondering as to the meaning of the colon. As well with the variables defined after the ":" I see some "(0)" and I am wondering as well to the exact meaning of the "(0)". Are those variables being defined as parameters separated by ","?

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C :: Socket Programming Support Multiple Ports - Defined Variables

Sep 3, 2013

I want to put my socket programming example of how it can support multiple ports. I want to make the process more requests from distributing particles to create non-blocking structure

ports support ports defined variable.

Code:
#include "stdio.h"
#include "stdlib.h"
#include "unistd.h"
#include "errno.h"
#include "string.h"
#include "sys/socket.h"

[Code] .....

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C :: Calling Functions With Arguments Using Pointer Variables As Operators

Feb 2, 2013

There are, or course, better ways to do this, but I need to stick to some rules:

(1) Use only pointer variables and not arrays or structs.
(2) Use the three functions shown--regardless of easier methods.

The program should ask for some input, operate on those numbers, and then display the results. I know I am confused over these things:

(1) All that syntax using '*' and '&' or neither.
(2) How to use the char type correctly.
(3) How to use a char type input as an operator (a + b).
(4) How to use the pointer of the operator variable (+,-,*,/) in an actual equation.

Code:
#include <stdio.h>
#include <stdlib.h>
// *** Prototype Functions ***
void Post_Results (float*);
void Calculate (float*, float*, char*, float*);
void Get_Numbers (float*, char*, float*);

[Code]......

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C++ :: Returning Values Or Using Pointers To Redefine Variables Passed As Arguments?

Feb 28, 2014

Which is more efficient in functions? Returning values or using pointers to redefine variables passed as arguments?

I mean either using:

void ptr_Func(int *x)
{
*x = *x+1
}

or

int ptr_Func(int x)
{
return x + 1;
}

In terms of speed, memory use etc.I want to know general efficiency, I know it will obviously vary with different uses and circumstances.

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C++ :: Using Map Against Defined Input?

Sep 16, 2013

What I want to do is have a defined string as the input and use that to run it against the keys, so I can pull out the values. I have some functions beneath for searching, a possibility would be to parse the input and use something along those lines.

I would like to try and use a map for this.

#include <iostream>
#include <map>
#include <string>

[Code].....

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C :: Printf Int That Was Defined In Another Function?

Feb 26, 2013

I'm making my way through most of this assignment that I have, but now it seems like I've run into a bit of a roadblock. The issue that I'm having is not being able to printf a series of ints that I thought I had previously defined in another function. I don't want to clog up this post with the entire code, so I'll just post one function that defined an int to give an example. I will upload the whole thing upon request however.

Code:

#include <stdio.h>
#include <stdlib.h>
//Prototypes
int AGrade1(int* grade1);
int AGrade2(int* grade2);
int AGrade3(int* grade3);

[Code] .....

I've tried many many things, but I just cant figure it out. This is what it's supposed to look like.

Assignment Grades:
18 12 17 15 20 13
20 18

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C :: Testing If A Macro Is Defined To A Value?

Jan 16, 2015

Say I have something lke

Code:
#define FOO BAR
#if FOO == BAR
doX();
#else
doY();
#endif

This causes doX(); to be executed. But the intent is to have doY(); be run. I'm guessing this is because BAR is undefined and therefore blank, so blank equals blank. Is there some way to compare the symbol FOO was set to instead of its value, BAR?

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C++ :: Determine If A Function Has Been Defined

Apr 8, 2013

I would like to make a handler for input events, but not be required to define all the functions.For example, if I had

void mouseDown(int button,vec2 pos);
void mouseUp(int button,vec2 pos);
static void mouseStateHandle(int button,int state,int x,int y) {
switch(state){
case DOWN:

[code]....

in the 'mouseStateHandle' function? I don't know enough about C++ to be able to come up with a solution.

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C++ ::  Using Enum Defined In Class

Apr 1, 2013

I am trying to write a game in C++ with SDL, and I have a class that allows me to handle events. The class is actually really simple: It takes the SDL_Event, then 2 variables from 2 different enum to determine for which Event and which Key should be checked, and then a variable that will be modified if the event happens. Here is the class

EventParser.h
#include "SDL.h"
#include "SDL_opengl.h"
template<class T>

[Code]...

As of yet the variable only changes if the Left key has been released, it will be extended if the error has been solved.

Then, in my main.cpp file I define the Event and the EventParser as

SDL_Event event;
EventParser<float> ep;

And in a loop, the parseEvent function is called like this:
ep.parseEvent(event, ep.KeyUp, ep.LEFT, &xVariable);

However I get a linker error (not the first one I got when programming this game)
error LNK2019: unresolved external symbol "public: void __thiscall EventParser<float>::parseEvent(union SDL_Event,enum EventParser<float>::EventType,enum EventParser<float>::KbdKey,float *)" (?parseEvent@?$EventParser@M@@QAEXTSDL_Event@@W4EventType@1@W4KbdKey@1@PAM@Z) referenced in function _SDL_mainC:UsersPrideRageDocumentsVisual Studio 2012ProjectsSDL_TestSDL_Testmain.objSDL_Template

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C++ :: Error LNK2005 - Already Defined

Jan 29, 2014

I have 4 files:

def.h
mms.h
mms.cpp
runMms.cpp

In the first one I define a struct. In the second I declare/create a new class called mms and I include "def.h". The third one is the cpp file of the class and I include in it "mms.h" (no, I don't include in it "def.h"). The fourth and last has the 'main' and I include in it "mms.h"

For some reason I'm getting the "error: lnk2005 alread defined ..." I know it usually has to do with putting some header file or definitions twice but I can't see where I got wrong.

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C++ :: Linking Errors - Xxx Already Defined

Sep 7, 2012

I am forced to have the deceleration of a class template in the .h file.

See here: [URL] ....

This works perfectly fine, as long as i #inlcude the header file only in ONE .cpp file.

The moment i #inlude it in several .cpp files, i get LNK2005 already-defined errors.

a.obj : error LNK2005: "public: unsigned int * __thiscall theclass::themthod(void)" (?xxx@theclass@@QAEPAIXZ) already defined in b.obj

I would have assumed inclusion guards can protect me from this, but wrong.

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C :: GTK In Forked Process

Dec 13, 2013

I have app that has while true on input listening to changes and then in some condition needs to open simple gtk app, and afterwards continue listening.

I thought that i could fork gtk part, and kill it when it is not needed.

But am not finding much examples on internet. 2 processes dont share data. Can child process start a gui app? And is this a good approach.

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C/C++ :: How To Run A Process From Memory

Mar 8, 2013

I am looking for a way to run a process form memory, without having any executable. The application will be kept inside a resource and will be extracted during run time. It should be then started as a new process. I couldn't find a solution that works also on x64

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C++ :: Classes Defined With Struct And Union

Mar 12, 2013

Classes defined with struct and union

Classes can be defined not only with keyword class, but also with keywords struct and union.

The concepts of class and data structure are so similar that both keywords (struct and class) can be used in C++ to declare classes (i.e. structs can also have function members in C++, not only data members). The only difference between both is that members of classes declared with the keyword struct have public access by default, while members of classes declared with the keyword class have private access. For all other purposes both keywords are equivalent.

The concept of unions is different from that of classes declared with struct and class, since unions only store one data member at a time, but nevertheless they are also classes and can thus also hold function members. The default access in union classes is public.

The above is a statement taken from a C++ tutorial. So I understand classes a bit better now but the above quote doesnt make too much sense. Is it saying that you can have a class within a class?

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C :: Signal Function Defined Twice With No Error?

Dec 13, 2013

I'm using a library in my code in a file called "my_signal.c". In this file I've defined this function:

Code:
Sigfunc * signal(int signo, Sigfunc *func){
struct sigaction act, oact;
...
}

Since the signal function is also in file signal.h and I included it in "my_sygnal.h" file, I'm wondering why the compiler did not say anything about this "double declaration" of the function with the same name.

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C :: User Defined Array Size

Jul 23, 2014

The instructions call for the user to define the size of the array and all I have ever done is use a predefined size for the array and then let the user fill it. Here is what I have so far:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
void Display (void);
void random (int *, int);
void Ascending (int *, int);
void Descending (int *, int);

[code]....

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C++ :: STL Set Orderinf User Defined Objects

Mar 4, 2014

#include<iostream>
using namespace std;
#include<set>

class person{
int age;

[Code] ....

When I executed the above code it displays

Age is 37
Age is 25

Here I have defined operator< so that set can identify the order of person objects. I am clueless how set could identify that

person p[3]={person(25),person(37),person(25)};

I have provided one duplicated object with age 25

I havent overloaded == operator also,then how it could identify?

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C++ ::  Calling A Function With Dynamically Defined Name

Feb 19, 2013

Is there a way to call a function whose name is defined in a file-stored-list?

In other words: The caller doesn't know in compile time the name of the function.

I'm not talking about polymorphism.

The problem is: I have a list of function names stored in a file, that may change every now and then, and I'd like to call them in the sequence they appear in that list.

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C++ :: Built In Functions And User Defined?

Feb 25, 2015

what is a built in function and user defined is cause i cant seriously find a decent example about it in the net

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C/C++ :: Undefined Class Member Even Though It Is Defined?

Jan 2, 2015

I made this code (it does nothing I am just learning about classes, I was learning about friend functions) and I don't understand what is wrong, here is the code:

#include <iostream>
#include <cstdlib>
#include <cstring>
using namespace std;
class MyClass {
public:
friend int add(int a, int B)/>;
[Code] ....

I know i didn't need to include cstdlib and cstring for this code but as I said, it's not supposed to be something it's just for practice and I was working on char arrays. My question is about the part where i try to define the function:

int MyClass::add(int a, int B)/>
{}

My compiler(Microsoft Visual C++ 2010 Express) says that class MyClass has no member "add" even though it does...

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C :: Using Process ID As The Name Of File Directory

Jan 31, 2015

I need my Unix program to generate a directory with a format like this: "hinesro.<pid>". I have some code that mostly works, except for the directory ends up with a question mark on the end, like this: "hinesro.12345?". I need it to just display the directory without this question mark. Here is my code:

Code:

// Using headers sys/types.h, sys/stat.h, unistd.h, and stdio.h
int pid = getpid();
char prefix[] = "hinesro.";
char fileName[0];
sprintf(fileName, "%s%d
", prefix, pid);

[Code]...

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C++ :: Inheritance Slows Down Process

Sep 5, 2013

i have read that inheritance slows down the process.because a_class -> b_class -> c_class it goes thorough many classes to find a function or a value. people advices not to do it more than a few times. what if instead of inheritance we are using headers, would it slow down the process also??i mean which one is faster? and arent both the same when we use headers or used inheritance.

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Nov 25, 2014

I am looking into how to create zombie process. They are created when parent process don't call wait() and hence they are not removed from the process table. How do I create zombie process in C++? What part of the code when missed, make a process/thread zombie? Is it the pthread_join()?

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C# :: Multitasking On Process And Progress Bar?

Apr 9, 2015

Am developing windows forms application where in my form am fetching data into list from some object which takes around 2 minutes to complete processing so meantime i want to show progress bar before starting process till it ends with percentage. I have return a code to do multitasking but it is throwing error as "Cross-thread operation not valid: Control 'listOrg' accessed from a thread other than the thread it was created on".

private void btnOrg_Click(object sender, EventArgs e) {
try {
// To report progress from the background worker we need to set this property
backgroundWorker1.WorkerReportsProgress = true;

[code]....

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Mar 29, 2014

I would like to ask about editing proccess memory.For example,I would like to create some program for a multiplayer game which I play.How do I work with memory adresses and what are commands for it.

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