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POCompiling C++ code on Mac
 

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  1. POCompiling C++ code on Mac
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    <p>I want to write very simple C++ programs on my Mac but I get errors. I don't have a lot of experience with C++ (and gcc) and the simple guides on the web also don't discuss this topic.</p> <p>Please have a look at my simple hello world program:</p> <pre><code>erik2:~[03:38 pm]$ cat hw.cpp #include &lt;iostream&gt; int main () { cout&lt;&lt;"Hello World!"; return 0; } erik2:~[03:38 pm]$ gcc hw.cpp hw.cpp: In function ‘int main()’: hw.cpp:5: error: ‘cout’ was not declared in this scope </code></pre> <p>Responding to the answers until now (thanks a lot), I put back(!) the namespace declaratation, but that doesn't result in a success, though:</p> <pre><code>erik2:~[03:51 pm]$ cat hw.cpp using namespace std; #include &lt;iostream&gt; int main () { cout&lt;&lt;"Hello World!"; return 0; } erik2:~[03:51 pm]$ gcc hw.cpp Undefined symbols: "___gxx_personality_v0", referenced from: ___gxx_personality_v0$non_lazy_ptr in ccphDFtO.o "std::ios_base::Init::~Init()", referenced from: ___tcf_0 in ccphDFtO.o "std::basic_ostream&lt;char, std::char_traits&lt;char&gt; &gt;&amp; std::operator&lt;&lt; &lt;std::char_traits&lt;char&gt; &gt;(std::basic_ostream&lt;char, std::char_traits&lt;char&gt; &gt;&amp;, char const*)", referenced from: _main in ccphDFtO.o "std::ios_base::Init::Init()", referenced from: __static_initialization_and_destruction_0(int, int)in ccphDFtO.o "std::cout", referenced from: __ZSt4cout$non_lazy_ptr in ccphDFtO.o ld: symbol(s) not found collect2: ld returned 1 exit status </code></pre>
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    1. COBasing on the [FAQ](http://apple.stackexchange.com/faq), this question is off-topic.
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    2. COBesides the `using namespace std;`, you should use the command `g++` instead of `gcc` to compile C++ programs.
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    3. CO@kiamlaluno: Thanks and sorry for not reading them ahead of posting there!
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