//定义一个宏。宏里面是指针函数#define CV_INT_HAAR_CLASSIFIER_FIELDS()                                 \    float (*eval)( CvIntHaarClassifier*, sum_type*, sum_type*, float ); \     //计算分类器haar特征值    void  (*save)( CvIntHaarClassifier*, FILE* file );                  \     //保存haar特征值    void  (*release)( CvIntHaarClassifier** );                                //释放特征值/* internal weak classifier*/typedef struct CvIntHaarClassifier//内部弱分类器{    CV_INT_HAAR_CLASSIFIER_FIELDS()} CvIntHaarClassifier;/* * CART classifier */typedef struct CvCARTHaarClassifier{    CV_INT_HAAR_CLASSIFIER_FIELDS()    int count;    int* compidx;    CvTHaarFeature* feature;    CvFastHaarFeature* fastfeature;    float* threshold;    int* left;    int* right;    float* val;} CvCARTHaarClassifier;