I i'm trying to start using the g++ compiler again. I read a tutorial and got started. This is what I get in the terminal

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bash-4.1# g++ helloworld.cpp -o helloworld
bash-4.1# ./helloworld
bash: ./helloworld: Permission denied

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I guess that the file extension should be cpp. It looks like it compiles it just won't run

here is the program that comes from the tutorial i just don't know if it is right for this compiler

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// structure

// my first program in C++

#include <iostream>
using namespace std;

int main ()
{
cout << "Hello World!";
return 0;
}

It's probably a mask problem. First thing, let's check the permissions on the binary:
What does it say for your compiled binary?

it says helloworld

What does the whole line say?

In case it isn't clear, that is a lower case 'L' not the number '1' in the command.

chmod +x helloworld
./helloworld

the line says

-rw-rw-rw- 1 root root 6819 June 8 06:12 helloworld

---------- Post added 06-08-11 at 08:17 AM ----------

zoran what's that going to do?

Zoran's command will work then. But what you should do is compile your code as a user other than root. The reason you can't run the binary after compiling is that there is a security measure in Linux to protect your system from running malicious code. You could change this setting (read about umask), but if you log in as another user your system will be safer and your code will run.

Thank you both. I got it from here.

It's not that simple. I made a user account. I get the same Permission Denied. I tried recompiling it and still the same.

I tried chmod +x helloworld and i get this

chmod changing permissions of 'helloworld': Operation not permitted

I wonder if you mounted your file system to be no execute? What does the command "mount" report?

/dev/root on / type ext4 (rw,relatime,barrier=1,data=ordered)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
/dev/sda7 on /penguinpower type ext4 (rw)
/dev/sda2 on /windows7 type fuseblk (rw,allow_other,blksize=4096,default_permissions)
/dev/sda4 on /files type fuseblk (rw,allow_other,blksize=4096,default_permissions)
tmpfs on /dev/shm type tmpfs (rw)

are these fine in the source code:

#include <iostream>
using namespace std;

I'm really not all that experienced but I did make a B on my college c++ course. The class lacked on libraries.

The reason I am asking is because I didn't install any libraries other than what came on the slackware DVD. I installed everything

Hang on... what directory are you doing this in?

I am doing the programming in /files/penguin\ power/

/files is a partition mounted

if you were asking about when i typed in mount in the command line I did that in the home directory

Try compiling your code in your user's home directory: /home/USER_NAME