Getting C++ to compile inside Eclipse

Question

Trying to get Eclipse CDT plugin to compile a simple C++ app. I create a new C++ project, and add 1 file (test.cpp) and code it up like a "Hello, world!" example:

#include <iostream>
using namespace std;

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

I get highlighted syntax errors on using namespace std and cout, stating (respectively):

Symbol 'std' could not be resolved Symbol 'cout' could not be resolved

I'm sure I didn't install CDT with everything it needed to compile/build a full C++ app. Where could I start looking to figure out what I'm missing?

Solution

Do you have a compiler? Quoting eclipse documentation: 'Eclipse IDE for C/C++ Developers does not contain a compiler or debugger; if your system does not have one, you need to download and install one. Please see the Before you begin section of the C/C++ Development User Guide.'

There you can choose and find out how to install a compiler.

Specifically for your unresolved symbols problem, you need to have correct paths set in Project->Properties->C/C++ General->Paths and Symbols/Includes tab, which depends on the compiler you choose to install.