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#ifndef _GNULINUX
#define DllExport __declspec(dllexport)
#else
#define DllExport
#endif
 
#include <string>
#include <vector>
#include <iostream>
 
#ifdef __cplusplus
extern "C" {
    namespace FilterAPI {
#endif
 
class DllExport Filter{
public:
    static void setFilter(const std::vector<float>& vFilter, unsigned int uNumThreads);
 
};
 
void Filter::setFilter(const std::vector<float>& vFilter, unsigned int uNumThreads) {
}
 
#ifdef __cplusplus
}  //  namespace FilterAPI
}  //  extern "C" {
#endif

prog.cpp:16:17: error: expected initializer before 'Filter'
 class DllExport Filter{
                 ^
prog.cpp:22:6: error: 'Filter' has not been declared
 void Filter::setFilter(const std::vector<float>& vFilter, unsigned int uNumThreads) {
      ^

Standard output is empty