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PO'Error: expected a type' creating a new instance
 

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  1. PO'Error: expected a type' creating a new instance
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    <p>i have a problem, i hope you can help me. I'm creating a C++ program which is running on linux. I just defined two classes, which the main one is called Downloader and looks like this:</p> <pre><code> #ifndef __DOWNLOADER_H__ #define __DOWNLOADER_H__ #include "configDownloader.h" #include "mailServer.h" #include &lt;logger.h&gt; using namespace ObjectModel; namespace Downloader { class Downloader { private: ... MailServer *m_mailServer; public: Downloader(char* configFileName); ... }; } #endif </code></pre> <p>In the constructor of the class, i tried to create a new instance of the class MailServer, which i defined into the same Namespace. The code of MailServer looks this way:</p> <pre><code>#ifndef __MAILSERVER_H__ #define __MAILSERVER_H__ #include &lt;stdio.h&gt; #include &lt;list&gt; #include &lt;mail.h&gt; using namespace std; using namespace ObjectModel; namespace Downloader { class MailServer { private: list&lt;Mail&gt; m_mails; char *m_username; char *m_password; public: MailServer(); ~MailServer(); void Open(char *username,char *password); bool SaveEmails(char *pathFiles); void Close(); }; } #endif </code></pre> <p>The constructor of this class is defined correctly into the .cpp file, and everything seems correct... The problem is that when i try to create a new instance of MailServer inside the constructor of Downloader, the compiler says <strong>"error: expected a type"</strong></p> <pre><code>#include &lt;stdio.h&gt; #include "downloader.h" #include &lt;unistd.h&gt; namespace Downloader { Downloader::Downloader(char* fileName) { this-&gt;m_config = new ConfigDownloader(fileName); this-&gt;m_log = new Logger("Log",LOG_LEVEL_INFO,0); this-&gt;m_mailServer = new MailServer();//the compiler shows the error right here } ... </code></pre> <p>any ideas??... i read somewhere that it could be that the compiler is too old, but i don't feel really comfortably coding inside the makefile.</p>
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    1. USMauro Bilotti
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    2. VO
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    3. VO
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    1. COwhat does the compiler tell you?
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      1. USpiwi
    2. COYou may want to learn about `std::unique_ptr` and constructor initializer lists. They won't fix the problem you're having, but they will help with others you haven't even spotted yet.
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      1. PO'Error: expected a type' creating a new instance
      1. USBen Voigt
    3. COAlso, `using namespace std;` in headers is bad style.
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      1. USBen Voigt
 

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