Getting C++ IDE working

[JC75]

Hi, I'm a little new to Linux/Ubuntu and have been trying to set up a C++ IDE. I'm using Ubuntu 11.10, and have tried two of the more popular IDEs: Code::Blocks and Geany. So far they have resulted with the same error, however.
When I put in the simple code:
#include <iostream> using namespace std; int main () { cout << "Hello World!"; return 0; }

It comes up with:
2: using: not found
4: Syntax error: "(" unexpected

How should I fix this?

[stchman]

That program runs fine. Please wrap your code in
tags.

[CODE]
#include <iostream>
using namespace std;
int main() {
cout << "Hello World!\n";
return 0;
}

[r-senior]

I'd suggest getting that program working from the command line first to take the IDE setup out of the equation:


$ cat hello.cpp
#include <iostream>
using namespace std;
int main() {
cout << "Hello World!\n";
return 0;
}
$ g++ -o hello hello.cpp
$ ./hello
Hello World!


In other words, make a file called hello.cpp containing that program (or call it hello.cc if you prefer). Compile with the g++ command shown above and run with './hello'.

[Some Penguin]

2: using: not found


...what did you name the program? something.c, perchance, instead of .cpp / .cc?

[r-senior]

That was my first thought, but I tried it and got:


$ gcc -o hello hello.c
hello.c:1:20: fatal error: iostream: No such file or directory
compilation terminated.

[Vaphell]

do you have build-essential installed?
iostream is c++ header so it should be g++ -o hello hello.cpp

[Zugzwang]

@JC75: The error message suggest that you are trying to execute your C++ program as a Shell script. Make sure that you save it to a file with the ending .cpp (or .C with capital C), and that your IDE recognises the whole setting as a C++ program, so that it compiles the program before execution. Other than that, follow the other poster's suggestions and try to compile and run the program from the terminal.

[JC75]

Thanks Zugzwang, that worked!