My code has everything ok! But I don't get any output on the console.
This is my code:
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello world!\n");
return 0;
}
Click on build->run or hit Ctrl+F10 and a new CMD Window should pop up, showing you your "Hello world!".
I think Anti-virus might be causing a problem for you. Try excluding the folder that contains your file. There was another question posted with same problem and for that excluding the folder worked. Code::Blocks console app won't show output
I experienced this same problem on linux; installing xterm solved the problem for me.
See Settings > Environment > General Settings > Terminal to launch console programs
Please include getchar() in the function before return statement. This happens because the computer is executing your program and doesn't wait for you to see the output. Including getchar(), at the end mandates it to wait for an input & in the meanwhile you can observe your output
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello world!\n");
getchar();
return 0;
}
You can use the following command to use linux terminal, and it is tested by me.
gnome-terminal --geometry=80x20+300+240 -x
Related
I am trying to learn C++ now and created a Hello World program. When I compile it on Linux using g++ and it works perfectly fine. When I compile it on Windows using the Build tools, it still compiles the code into machine code, but I can't open the executable. I used the Microsoft build tools as a compiler. The code was:
#include <iostream>
using namespace std;
int main() {
cout << "Hello, World!";
}
The output should be: Hello, World!
**Question already answered:
The program closes because it is not run in cmd. To prevent the program from crashing add
```system("pause");```
at the end**
The executable is showing the correct output on the terminal, but that terminal closes that fast that you don't even realise it.
I'd advise you to open a command prompt, go to the directory where the executable is located and launch it over there. You'll see the desired output.
it possibility because
the app closes immediately after ouputing
add system("pause");
on the end
Its not that you can't open that exe file.
Once you click on that file, it opens up and does its work and closes.
To prevent your exe file from getting closed after doing its operation, you can add following line at the end of the main function :
getchar();
And now once you open your exe file, it wont close automatically, you will need to press "enter" to close it.
#include<iostream>
using namespace std;
int main(){
cout<<"hello world";
getchar();
}
I am having trouble executing my C++ code. I have written a basic "Hello World" program, and compiled it using the g++ make command. Here is my code:
#include <iostream>
using namespace std;
int main() {
cout << "Hello World" << endl;
return 0;
}
I am on Windows 10, using Emacs for code editing, and CygWin for compilation. I saved this file as hello.cpp. I then navigated to the directory in CygWin. Then I did the command make hello. This created hello.exe. Then, I attempted to execute the file using ./hello.exe. I also tried ./hello which also didn't work. When I type one of these commands and hit Enter, it just on the next line, not doing anything. I can type in this blank line, but it won't do anything. Does anyone know a way to make my code execute properly. Thank you.
EDIT: I tried running this at cpp.sh, an online C++ compiler, and it worked fine.
Your program probably is working but the console window is closing before you can see anything.
Try adding an input at the end of the program so it will wait.
I.E.
int a;
cin >> a;
Your code is most likely executing, but not outputting anything. That's because it's failing. Try checking the return value after it has run with echo $?. If it's not 0 then it has crashed. Also run it in gdb and see if it fails. The reason why it's failing is most likely a windows/cygwin clash - it's not your code.
Every time I try and run the Simple Hello World program in C++, I build it and it says nothing to build for FirstProject. The code looks correct, I'm using MinGW as my compiler, etc. Every time I try to run the program, instead of printing the output, it just terminates. Anyone have a clue?
#include <iostream>
using namespace std;
int main() {
cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!
return 0;
}
try these commands:
g++ -o hello_world.exe hello_world.cpp
./hello_world.exe
MinGW works same as gcc on linux so all commands which work on linux should work on MinGW
In cygwin, the following steps should work.
Save the contents to file HelloWorld.cc.
Go to the directory where you saved the file.
Execute make HelloWorld
Execute ./HelloWorld.exe
If that doesn't work, something is really not right.
Are you running it from the command line or an IDE? Sometimes an IDE will open a terminal and close it too fast for you to see, or you'll just see a flash. Try running it from the command line so you'll be able to see if it printed anything before exiting the program.
Tried and tested using MinGW in windows 10 command prompt.
#include <iostream>
using namespace std;
int main()
{
cout<<"Hello, World!"<<endl;
system("pause");
return 0;
}
Image of command prompt output
Save the contents to file HelloWorld.cpp
Go to the directory where you saved the file.
Execute make HelloWorld
Execute ./HelloWorld.exe
This is weird... Am on Windows 7 in a domain environment, doing a quick program to process a bunch of data [so no lecturing me on the evil of using system() =P ], and I've got this code:
#include <iostream>
#include <stdlib.h>
using namespace std;
int main()
{
system("dsget group \"CN=Accounting,OU=Groups,OU=Exchange Users,DC=MyDomain,DC=com\" -members");
}
The output is nothing at all. Stuff I've tried:
Ran that command verbatim on a command prompt, successfully got data back.
Did a "cout" on that command string to make sure the \" part was being processed right.
Did system("ipconfig -all") and other system commands to make sure that was working.
Did system("echo [dsget_command] > runThis.cmd") then system("runThis.cmd")... the only output was seeing it try to execute the dsget statement but still no results.
It's so weird that this is just happening to me on the "dsget" command, and also so weird that the command runs fine on a command prompt [not through the C++ program]. Any suggestions?
I just installed c/c++ development tools for my eclipse and everything is working except no text is being printed in the console when I run the hello world program, but I receive no errors. I'm really stumped, anyone know why this is?
Edit:
Ok I realized if that debug it, it works correctly, but not if I run it, any ideas there?
Are you using a 64-bit version of Eclipse? If so, that might be your problem. The 64-bit version doesn't do console output. sigh Try downgrading to the 32-bit version.
On SO, check this question.
On the Eclipse forums, check this thread.
Does a window pop up then disappear? It could be printing it in console then closing as soon as it hits the end of the code...
try to make your code like this:
#include <iostream>
#include <conio.h>
using namespase std;
int main()
{
cout << "helllo, world" << endl;
getch();
return 0;
}
You must set the environment so the eclipse can find the c++ compiler.
Go to Computer and right click Properties -> advanced system settings -> enviroment variables.
Scroll down in system variables and find the path (it is named so). Press edit and append in the path the value C:\MinGW\bin;C:\MinGW\msys\1.0\bin;. You will have something like C:\MinGW\bin;C:\MinGW\msys\1.0\bin;C:\programfiles........
Then start again the eclipse the problem should have been solved.