C/C++ :: External Variables Are Not Working
Aug 18, 2014#includ<stdio.h>
int x,y;
void eqn(int a,int b) {
x=a+b;
y=a-b;
[Code] ....
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C :: Need Of External Keyword In Order To Declare Variables Globally
Jan 30, 2014I think there is no always need of keyword extern in order to declare variables globally. Is it right?
For example I can declare a variable globally in one file and use it in some other provided that I have included the last one file ( that has the declaration of the variable of course) and compile these files together :
gcc -c f1.c f2.c for example
C :: How To Get Remote / External IP Of Computer
Oct 20, 2013I am starting to learn C, its quite an easy language to learn from the basics, I hope to learn others as time goes, I wonna know how do I get the external / remote IP of a computer?
View 6 Replies View RelatedC++ :: Write To External File In GCC
Jan 16, 2013I am trying to write to external file in GCC. So far I can get to this:
#include <iostream>;
#include <fstream.h>;
using namespace std;
int stream (int argc, char* const argv[]) {
ifstream in ("mcp.strings");
[Code] ....
I need to know if I am using the correct method to choose file name. And how to set a script(double) variable to print input text or choose an on/off (0|1) input to be written to a text file.
Any links to flags (i.e. pointers and how to use them).
C++ :: Adding External Libraries?
Feb 5, 2013I'd like to use the Big Integer Library [URL], but I have issues to use it. I'm using Xcode as compiler and I don't know how to include the library in my project files. When I drag all the files in the project directory and write the statement #include <BigInteger.hh> on the top of the declaration of the main function, even whiteout any other code, I get lots of build error on the .hh and .cc file.
how to include the library on my project.
C++ :: Reading External CPP File?
Aug 13, 2014I want to be able to make this code read those two lists from an external .txt file from my desktop for example. This will make it so I can read larger amount of words instead of having to paste them all in this script.
So instead of
std::istringstream tokens_in(
R"(word4
word5
word6
word1
[Code] ....
I want it to find those lists externally. How could this be done, if possible even?
C# :: Removing Title Bar From External App
Jan 3, 2015I'm trying to remove the title bar from an external app. The reason is I don't want anyone to be able to move it.
But my code below doesn't remove the title bar. Could this be because it's not removable? I read somewhere title bars of external apps may be not removable if the app doesn't allow it.
So, I'm not sure why my code doesn't work - either it's wrong or the app doesn't permit it?
My app is a winform.
int style = GetWindowLong(app1Win, GWL_STYLE);
style = style & ~WS_BORDER;
SetWindowLong(app1Win, GWL_STYLE, style);
SetWindowPos(app1Win, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
C :: Declaration And Definition Of External Variable
Jan 11, 2014Why I take warning on this code :
Code:
#include<stdio.h>
extern int v = 0; // Declaration and definition of an external
int main(void)
[code]...
Is there any error? Why I take a warning: 'v' initialized and declared 'extern'|||=== Build finished: 0 errors, 1 warnings ===| ???
and what is the meaning of :An extern declaration that initializes a variable serves as a definition of the variable. This rule prevents multiple extern declarations from initializing a variable in different ways.
C# :: Getting Text Contained In External Application
May 8, 2012i'm iterating through the system processes an when i find a process that belongs to a text oriented application, i want to read that text inside the external app. For example, when i get the process to an instance of notepad, i want to get the text contained inside notepad. i've tried to do it using Process.MainWindowHandle pointer, but with no success. How to do it? (This is for an "nanny" app i'm writing, which need access to text in external applications so that i can detect any unappropriated words)
View 3 Replies View RelatedC++ :: Unresolved External Symbol Errors
Apr 10, 2013I'm doing a homework assignment where I have to calculate monthly interest from a starting balance. I've pulled several sections of the code from various parts of the book. So my problem may be that I'm not combining them correctly.
I'm getting the following error:
Error1error LNK2019: unresolved external symbol "public: __thiscall SavingsAccount::SavingsAccount(void)" (??0SavingsAccount@@QAE@XZ) referenced in function _main
The ios flags are new to me and that may be part of the problem. As soon as I can get a working program, I'm going to make the starting balance and interest rate user inputs. But I get seem to get past this error.
// Savings.cpp
// Chapter 10_Problem 10.7
#include <iostream>
[Code].....
C++ :: Call External Application In Program?
Oct 27, 2014I am trying to call an external application in my C++ program , example, system("C:Program FilesInternet Exploreriexplore.exe"); but the application just gets closed.
1. double slashes need to be used.
2. the command that worked for me was "ShellExecuteEx"
C/C++ :: Function Pointers From External Class?
Jun 8, 2014How can i use a function pointer from external class? Say we have a class tuna
Tuna:
int foo(){
return 45;
}
int (*foobar)();
[Code].....
C++ :: Fatal Error - One Unresolved External
Apr 30, 2014I'm trying to implement this queue class, and I don't know why it won't compile. I wrote a main function in the main.cpp file and even commented out the calls to functions add and removed and still gave me the fatal error.
queue.h
#ifndef QUEUE_H
#define QUEUE_H
namespace queuesavitch {
struct QueueNode {
char data;
[Code] .....
C/C++ :: VS Errors - Unresolved External Symbol
Jan 14, 2015This is a file called namespaces.h
#pragma once
namespace mycode {
void foo();
}
This is a file called source.cpp
#include <iostream>
#include "namespaces.h"
namespace mycode {
void foo() {
std::cout << "foo() called in the mycode namespace" << std::endl;
}
}
When I try to run this code i keep getting these errors;
Error1error LNK2019: unresolved external symbol "void __cdecl mycode::foo(void)" (?foo@mycode@@YAXXZ) referenced in function _mainC:UsersHomeDesktopgameDevWin32Project1Win32Project1Source1.objWin32Project1
Error2error LNK1120: 1 unresolved externalsC:UsersHomeDesktopgameDevWin32Project1DebugWin32Project1.exeWin32Project1
this is a win32 console application, like the books says, the book i am working from that is.
C/C++ :: How To Link External Library In Application
May 4, 2012How can I use one external library in my C++ program?
View 3 Replies View RelatedC :: Test Is Not Recognized As Internal / External Command
Sep 11, 2013My prog name is test and the problem is when i compile it gives error : 'test' is not recognized as an internal or external command,operable program or batch file.
Code:
#include <stdio.h>
#define ISDIGIT(y) ( y >= 48 && y <= 57 )
main( )
}
[code].....
C++ :: How To Read External File Into Parallel Arrays
Dec 8, 2013I have an external file that I would like to read from this file and place the values into parallel arrays. The file has these values:
Rams
Titans
23
Patriots
Rams
20
Steelers
Seahawks
21
C++ :: Unresolved External Symbol - Basic Keylogger Using SDL
Feb 25, 2014My code is rather short, but when I compile it, I get 1 error about an unresolved external symbol, it probably has something to do with the file processing. . .
Just a basic keylogger using SDL
Keylogger.h
#ifndef KEYLOGGER_H
#define KEYLOGGER_H
#include <fstream>
#include <SDL.h>
using namespace std;
class Keylogger{
[Code] .....
Errors
Error1error LNK2019: unresolved external symbol __imp___CrtDbgReportW referenced in function "public: char const & __thiscall std::_String_const_iterator<class std::_String_val<struct std::_Simple_types<char> > >::operator*(void)const " (??D?$_String_const_iterator@V?$_String_val@U?$_Simple_types@D@std@@@std@@@std@@QBEABDXZ)C:Usersaviedocumentsvisual studio 2013ProjectsPracticePracticeKeylogger.objPractice
C++ :: Inline Function Prefix - External Call And GCC?
Jan 17, 2014I have some functions inlined using the inline function prefix. If the function is called from outside the file (so a seperate psp-gcc -O3 ... filename.c filename.o compile command, when only the function is changed), will the other files be updated too? (I'm using the pspsdk toolchain).
Example:
max.c
inline byte max(byte a, byte b) {
return a>b?a:b;
} use1.c
void use1() {
if (max(1,2)==0)
[Code] ....
If I compile this, next change the max function and recompile using make (the compiler only takes the changed max.c->max.o file, next links them together) will use1.c&use2.c be updated with the new max.c function?
C++ :: Error LNK2019 - Unresolved External Symbol
Feb 27, 2013I am currently working on an Account login system and when I run the program I receive this error message:
error LNK2019: unresolved external symbol
If you want to see the full code of the source file just ask
const int NUM_OF_ACCOUNTS = 1;
Account *account = new Account[NUM_OF_ACCOUNTS];
int AccountSearch(int number, string password);
foundAccount = AccountSearch(aNumSearch, passSearch);
int AccountSearch(int n, string p); {
int x = 0;
[code]....
C/C++ :: Unresolved External Symbol In MySQL Connector
Jul 1, 2014So even though I have so many issues with linking libraries, I apparently became the go-to person for a fellow college friend of mine for a sql library. He's using the mysql connector/c++ and his team has had quite a few issues getting it set up. I've solved two out of three issues:
1st issue I solved was that they didn't know how to build boost, I just linked it and they were good to go.
2nd issue I solved was that they were missing libmysql.lib, I just installed the mysql server onto their computer and linked that up. 3rd issue is where I am now stumped at, as they get a compile error: LNK2001 unresolved external symbol: _get_driver_instance().
C/C++ :: Error LNK2019 - Unresolved External Symbol
Apr 4, 2014// polynomial header file
#ifndef POLY_H
#define POLY_H
#include<iostream>
using namespace std;
class Polynomial {
friend ostream &operator<<( ostream &out, const Polynomial &rhside);
friend istream &operator>>( istream &in, Polynomial &rhside);
[code]....
C# :: External Window Paint / Draw Hook?
Jan 13, 2014Is there any way that I can call a function/receive an event whenever an external window (not any of my forms) repaints/draws?
If you create a GDI+ graphics object and give it the HWND of another window that refreshes a lot like a web browser, anything with animated graphics, your draws and the windows draws are out of sync which creates an intense flicker effect.
Googling this issue only brings up results for handling when my own form repaints...
My idea is that I could just redraw my GDI stuff whenever the form redraws, this is indeed possible?
C# :: Testing Devices For Up / Down Status On External Network?
Jul 11, 2014I know I can use ping internally to test a device's connectivity. What can I use to test devices on another network (assuming ports are forwarded, and their IP addresses are at my disposal)? I was looking into the TCP Client class.. would that also work with devices using DynDNS?
View 7 Replies View RelatedVisual C++ :: Creating DLL That Will Be Used As Plugin In External Program Using MFC
Jan 30, 2013This is the problem in detail:
I have a VC++ project to create a DLL that will be used as a Plug-in in an external programm. This DLL uses some MFC functions. The initial configuration of the project was:
-Use of MFC: Use MFC in a Static Library
-Common Language Runtime support: No Common Language Runtime support
-Runtime Library: Multi-threaded Debug (/MTd)
This configuration worked fine, there were no compilation errors and the resulting DLL worked correctly.
The problem came when it was necessary to add to the DLL some functions of .NET, using the namespace System and similar. To do that, I had to change the Common Language Runtime support, to Common Language Runtime Support (/clr). Then, when I tried to compile, I got this message:
'/MTd' and '/clr' command-line options are incompatible
So I changed the Runtime Library to Multi-threaded Debug DLL (/MDd). Then I got this error message:
Building MFC application with /MD[d] (CRT dll version) requires MFC shared dll version
So I also changed the Use of MFC to Use MFC in a Shared DLL.
After this, the compilation was correct. Then logically the size of the generated DLL is smaller, but this new DLL does not work correctly, the external program in which this DLL is used crashes.
I don't know what to do to fix the problem. Maybe I need to add some other DLLs or files to the directory where the DLL is located, where the external program uses it. But I would prefer to include a single DLL file, but this seems to be incompatible with the use of .NET functionality.
C++ :: Store Related Data Of Program Into External File?
May 14, 2013How is it possible to store the related data of a program C++ into an external file (like as .txt) and retrieve it?
I want to write c++ program that can contain data members " id and phone"
like as
Code:
class profile {
private: int id,phone;
public:
void retriever() {
cout<<"Enter your ID: ";
cin>>id;
cout<<"Your Phone number is "<< phone;
};
}
avoiding formats in above class, purpose is to store data already in txt file with different id and phone numbers and it is to be retrieved by matching id number to txt file and viewing its related phone number.