Gdpfile.dll

DLL_API const char* get_last_error(void) { return last_error_msg; }

DLL_API int read_gdp_file(const char* filename, double* data, int max_size) { // Your GDP file reading logic here return 0; // return number of values read } gdpfile.dll

And the implementation:

DLL_API int write_gdp_file(const char* filename, const double* data, int count) { // Write GDP data to custom file format return 1; // success } } DLL_API int read_gdp_file(const char* filename