c++ - Qwt missing includes -


when typing following line:

qwtpointseriesdata* mydata = new qwtpointseriesdata;

it says me identifier undefined. have typed following includes in which, mentioned cannot open opens pource files.

#include <qwt_plot_curve.h> #include "qwt_series_data.h"

any ideas how solve , find out how them?

to answer question : seems having old version of qwt!


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