expected type-specifier before 'Class Name' / not declared in this scope

[ChrisW67]

#include <QtGui/QApplication>
#include <myclass.h>
#include "manidialog.h"
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    ManiDialog *w = new ManiDialog( 0 );
    MyClass *m = new MyClass();
    w->show();
    return a.exec();
}

#include <QtGui/QApplication>
#include <myclass.h>
#include "manidialog.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    ManiDialog *w = new ManiDialog( 0 );
    MyClass *m = new MyClass();
    w->show();
    return a.exec();
}

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At line 2 you are asking the pre-processor to look for the file myclass.h in the system include directory path. This path is a compound of a built-in value and any "-I" directives (or equivalents) and typically does not include the current directory. You should be receiving a pre-processor error saying it cannot find myclass.h before you get the error message you are describing here.

Have you tried:

#include "myclass.h"

#include "myclass.h"

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The compiler will look in all the same places for the file but it will look in the current (actually same directory as the cpp file) directory first.