Every time I try to execute a program, no matter what program, I get this message:
bash: ./filename.cpp: Permission denied
When I compile I have no problems, it works fine. But when I want to execute I get this message.
Does it have anything to do with permissions? Because I'm having a lot of problems with this, too. I can't access my shared folders, unless I use
sudo nautilus
Please see my other question.
To compile and run a .cpp file in Ubuntu, follow this example guide
First we need a .cpp file, we will save it as main.cpp and in home/user/documents
#include <iostream>
using namespace std;
int main ()
{
cout << "Hello World!";
return 0;
}
If you need it install g++
sudo apt-get install g++
Now we have an program, we can go to Home/user/documents and compile it
cd ~/Documents
g++ main.cpp
This will produce a file named a.out in your /home/user/Documents directory
Now run the a.out
./a.out
Output will be
Hello World!
g++ -o yourprog main.cthen./yourprog- do not add the-cflag to theg++command unless you want it to produce an object code file instead of a full executable. See What is a command to compile and run C++ programs?main.cppfile does not actually contain amainfunction: see Linker returns “relocation has an invalid symbol at symbol index…”