Compiled through compiler like Code::Blocks, I have tried the following, bit it does not work:
/*Running Firefox.exe*/
#include <stdio.h>
/*using c++*/
#include <iostream>
#include <stdlib.h>
using namespace std;
int main ()
{
int x;
cout << "Checking if processor is available..." << endl;
/*System used here*/
if (system(NULL)) puts ("Proceed");
else exit (1);
cout<< "Executing Firefox..." << endl;
/*Having some error here saying not recognized as internal or external command*/
x = system ("C:/Program Files (x86)/Mozilla Firefox/firefox.exe");
/*cout here*/
cout <<"The value returned was:" << x << endl;
return 0;
}
Is it because Firefox is not recognized as a system of windows? If so how can I run Firefox, or even Internet Explorer from code?
Run cmd.exe (Windows command shell) and enter the string C:/Program Files (x86)/Mozilla Firefox/firefox.exe at the command line, and you will see the same problem - i.e. the problem is with your command string rather than your C++ code.
The space in the path requires the command string to be quoted:
system ("\"C:\\Program Files (x86)\\Mozilla Firefox\\firefox.exe\"") ;
or
system ("\"C:/Program Files (x86)/Mozilla Firefox/firefox.exe\"") ;
I believe you need to convert path to DOS format
Launch a command prompt cd into Mozilla Firefox folder
run this: for %I in (.) do echo %~sI
Copy the output to system command with \ replaced with \\ append firefox.exe at end
Is it because Firefox is not recognized as a system of windows?
If you open up cmd.exe and type in C:/Program Files... it won't work because spaces are used as a delimiter. Quote your path:
system("\"C:/Program Files (x86)/Mozilla Firefox/firefox.exe\"");
Although if you're targeting Windows you should consider using CreateProcess which saves you this trouble.
If so how can I run Firefox, or even Internet Explorer from code?
If you want to show a web page, use ShellExecute* and let the shell do the work. It will take care of launching Firefox, Internet Explorer, Chrome, or whatever browser the user has configured to view web pages.
*Read the Remarks section about initializing COM, first.
Try using windows API CreateProcess API
Related
I am a first time C++ user, and I have been working for 8 hours trying to build and compile the simple "Hello World" program with C++ in Visual Studio Code. I have CygWin64, but I'm not sure if it's connected to my VSCode. I have installed the extensions C/C++, C/C++ Compile Run, C++ Intellisense, Clang-Format, and Easy C++ projects.
So far I have tried
#include <iostream.h>
main()
{
cout<< "Hi there";
return 0;
}
and
#include <iostream.h>
int main() {
std::cout << "Hello Easy C++ project!" << std::endl;
}
Using iostream.h helped me to get to work (it wouldn't at first), but I'm not sure if that is helpful, since other posts say that .h is very archaic. I have also tried editing my c_cpp_properties.json file. Sadly, I still get the message:
"> Executing task: bash -c "make run" <
'bash' is not recognized as an internal or external command,
operable program or batch file.
The terminal process terminated with exit code: 1
Terminal will be reused by tasks, press any key to close it."
I am not sure if I need to install an alternative to Clang (I haven't found one), or run something initially on Cygwin64.
I have been looking online for suggestions and following pages such as https://dev.to/acharluk/developing-c-with-visual-studio-code-4pb9 and https://github.com/Microsoft/WSL/issues/1598, but I still can't seem to get around this problem.
Any help would be very appreciated.
Thanks,
Anne
I am trying to get the value of environment variable $PATH in Linux using a simple C++program as bellow:
#include <iostream>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
int main ()
{
// get PATH using pipe
FILE* pip = popen("exec bash -c 'echo $PATH'", "r");
if (!pip)
{
printf("can not open pipe!");
return 1;
}
char lineversion[600];
memset (lineversion, 0, sizeof(lineversion));
if (!fgets(lineversion, sizeof(lineversion), pip))
{
printf("fgets error!");
return 1;
}
std::cout << lineversion << std::endl;
// get PATH using getenv
char* pPath = getenv ("PATH");
std::cout << pPath << std::endl;
}
I used two different methods: using pipe and using getenv method. They both output this:
/opt/texbin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/local/netbeans-7.3.1/bin
Interestingly the actual value of PATH is something different!
Why my C++ program is showing a different value for PATH?
Edit 1: I am running my C++ program in Eclipse IDE.
Edit 2: Compiling the program directly (without Eclipse IDE) shows the correct PATH value!
Edit 3: I found the answer in here too.
A process inherits the environment from the process that created it.
This is how Linux works, along with many other operating systems.
If you launch a program from Eclipse, that program inherits Eclipse's environment.
If you launch a program from the shell, that program inherits the shell's environment, including the modifications to PATH you have in your init files.
Since Eclipse has inherited its environment from whichever process launched it, you should see the expected output if you launch Eclipse from the shell instead of through your desktop GUI.
i am new to qt. Trying to run some simple application in QtCreator 3.2.1 which is based on QT5 on Debian system.
i create c++ plain project with cmake
#include <iostream>
using namespace std;
int main()
{
string name;
cout << "please enter your name:\n";
cin >> name;
cout << "hello" << name << "\n";
return 0;
}
The problem is that when i launch the application, and input some string. The application console dont have any resp.
I confirm that the application can be run in my gnome-terminal.
After that, i check the same message from the stackoverflow.
there is a solution "set project run in terminal".
Then i look for that on the QtCreator 3.2.1. I cant find that menu. Only have the terminal setting.
unfortunately, whichever i choose,
1. /usr/bin/xterm -e
2. /usr/bin/gnome-terminal -x
3. /usr/bin/x-terminal-emulator -e
the problem still exist.
you must choose the "Run in Terminal" if you create CMake project with C++
Like the questioner in "New to Xcode can't open files in c++?" I'm learning Xcode and OS X (I'm using Xcode 7 on a Yosemite mac).
I can get the code to work perfectly when I build and run it, but can't get the executable to work when I try to run it as a stand alone program.
I'm trying to translate some games I've written on a PC in C++ using SFML.
There has to be a way to save high scores and previous games within an app, but this has me stymied.
This is the sample code I used based on the previous question:
#include <string>
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
ifstream fin;
ofstream fout;
string input;
fin.open("inputFile.txt");
if(fin.fail())
cout << "File failed to open." << endl;
fin >> input;
fin.close();
fout.open("outputFile.txt");
fout << input;
fout << "\n Data transferred \n";
fout.close();
}
This works perfectly when I build and run it, so I've got the proper path to the desktop folder set up. (I'm putting the data files in the same folder as the executable and specifying the path in Xcode.)
No problems when I run this within Xcode, but this is the message on the terminal console when I run the executable by itself:
"…/Desktop/datafiles/Build/Products/Debug/datafiles ; exit;
…/Desktop/datafiles/Build/Products/Debug/datafiles ; exit;
File failed to open.
logout
Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.
[Process completed]"
Is there another flag or path that needs to be set within Xcode for this to work? Two other related questions: How do I access the terminal history to see what is going on? Finally, if I set up the project as an SFML app instead of a terminal project (command line tool app), why can't I see the files within the SFML app, even though I've set the command line flag to see hidden files, and I can see other hidden files on my hard drive? I can see the files if I open the SFML app folder in Windows, so I know they are there.
This is my first question on Stack Overflow, so apologies if this should be appended to the previous question, but this doesn't appear to be an answer to me, but is quite a different version of the original question that is not addressed in the answers.
Thanks!
I have a very simple C++ program with a very simple project setup, but when I run the program I get no output. If I run the program in debug mode, it works perfectly. I am using Eclipse Kepler CDT 32 bit on windows with MinGW. I am somewhat new to eclipse, so it's probably something I did wrong.
The program is:
#include <fstream>
#include <iostream>
#include <string>
using namespace std;
ofstream outfile("testdata.txt");
int main()
{
outfile << "Program Start\n";
cout << "Program Start\n";
return 0;
}
Help!
If the problem is that the program quickly opens and then closes before you can see the output on the screen, then you can just run your program from any shell (CMD on Windows, bash on Linux, etc.). That way, it won't exit once your program ends and you can see the results.
Make sure also that you flush/close your ofstream before your program exits.
The problem is rather not releted to c++ itself. You should check if via "cmd" typying it in "launch menu" after you click start. Find the path of your program, then run it.
For the very beginning it is recommended to spend a few hours with terminal(cmd). To know how things works. After that you will be independent - you will be able to write the code in any IDE. Also simple trick to make it working is to use std::cin.get() . It is prefered to system("pause").
You open the testdata.txt file using the relative path.
And the created file may be created in the project binary output path, where the executable located in.
You can use everything software to check whether a file is created and its created path.
everything
For example, you can type your output file name testdata.txt into everything software to see where output file created.And check if the testdata.txt created in a wrong path or directory.