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POExpected class name before { token
 

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    <p>Here are the two header files.Child and parent.Can anyone explain why this error occures?</p> <p>Thanks in advance</p> <p>SampleApplication.h:</p> <pre><code>#ifndef SAMPLEAPPLICATION_H_ #define SAMPLEAPPLICATION_H_ #include "ns3/CcnModule.h" #include "ns3/CCN_Name.h" #include &lt;string&gt; class CcnModule; class SampleApplication : public ns3::Application { public: ns3::Ptr&lt;CcnModule&gt; ccnm; static ns3::TypeId GetTypeId(void); virtual ns3::TypeId GetInstanceTypeId (void) const; SampleApplication(); SampleApplication(ns3::Ptr&lt;CcnModule&gt; ccnm); virtual ~SampleApplication(); char* data; int length; ns3::Ptr&lt;CCN_Name&gt; dataName; void SendInterest(ns3::Ptr&lt;CCN_Name&gt; n); void SendData(ns3::Ptr&lt;CCN_Name&gt; data, char* buff, int bufflen); virtual void InterestReceived(ns3::Ptr&lt;CCN_Name&gt; ccnn); virtual void DataArrived(ns3::Ptr&lt;CCN_Name&gt; data, char* buff, int bufflen); void AnnounceName(ns3::Ptr&lt;CCN_Name&gt; n); virtual void DoDispose(); virtual void DoInitialize(); }; #endif </code></pre> <p>Receiver.h:</p> <pre><code>#ifndef RECEIVER_H_ #define RECEIVER_H_ #include "ns3/CcnModule.h" #include "ns3/CCN_Name.h" #include &lt;string&gt; #include &lt;vector&gt; #include "ns3/SampleApplication.h" class CcnModule; //class SampleApplication; class Receiver : SampleApplication { public: static ns3::TypeId GetTypeId(void); virtual ns3::TypeId GetInstanceTypeId (void) const; Receiver(ns3::Ptr&lt;CcnModule&gt; ccnm); virtual ~Receiver(); void SendInterest(ns3::Ptr&lt;CCN_Name&gt; n); virtual void DataArrived(ns3::Ptr&lt;CCN_Name&gt; data, char* buff, int bufflen); }; #endif </code></pre>
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    1. COThis error occurs at which line?
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      1. USIgor Tandetnik
    2. COclass Receiver : SampleApplication { Here ,as if SampleApplication is not a class.
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    3. COThis basically means that `SampleApplication` is not being recognized as a type. Which means that there is somthing wrong with your inclusion of header files. Either you have a circular dependency (and thus it is not visible at the point you are using it) or it is in a nested namespace and not visible. Can you reduce this to a small compilable example that reproduces the problem.
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      1. USMartin York
 

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