fixed build issue (MSVC2010, x64)

samples/cpp/letter_recog.cpp

@@ -519,9 +519,9 @@ int build_knearest_classifier( char* data_filename, int K )
     CvKNearest knearest(&train_data, train_resp);
 
     CvMat* nearests = cvCreateMat( (nsamples_all - ntrain_samples), K, CV_32FC1);
-    float _sample[var_count * (nsamples_all - ntrain_samples)];
+    float* _sample = new float[var_count * (nsamples_all - ntrain_samples)];
     CvMat sample = cvMat( nsamples_all - ntrain_samples, 16, CV_32FC1, _sample );
-    float true_results[nsamples_all - ntrain_samples];
+    float* true_results = new float[nsamples_all - ntrain_samples];
     for (int j = ntrain_samples; j < nsamples_all; j++)
     {
         float *s = data->data.fl + j * var_count;
@@ -550,6 +550,8 @@ int build_knearest_classifier( char* data_filename, int K )
     printf("true_resp = %f%%\tavg accuracy = %f%%\n", (float)true_resp / (nsamples_all - ntrain_samples) * 100, 
                                                       (float)accuracy / (nsamples_all - ntrain_samples) / K * 100);
 
+    delete[] true_results;
+    delete[] _sample;
     cvReleaseMat( &train_resp );
     cvReleaseMat( &nearests );
     cvReleaseMat( &result );
@@ -593,9 +595,9 @@ int build_nbayes_classifier( char* data_filename )
         train_resp->data.fl[i] = responses->data.fl[i];
     CvNormalBayesClassifier nbayes(&train_data, train_resp);
 
-    float _sample[var_count * (nsamples_all - ntrain_samples)];
+    float* _sample = new float[var_count * (nsamples_all - ntrain_samples)];
     CvMat sample = cvMat( nsamples_all - ntrain_samples, 16, CV_32FC1, _sample );
-    float true_results[nsamples_all - ntrain_samples];
+    float* true_results = new float[nsamples_all - ntrain_samples];
     for (int j = ntrain_samples; j < nsamples_all; j++)
     {
         float *s = data->data.fl + j * var_count;
@@ -618,6 +620,8 @@ int build_nbayes_classifier( char* data_filename )
 
     printf("true_resp = %f%%\n", (float)true_resp / (nsamples_all - ntrain_samples) * 100);
 
+    delete[] true_results;
+    delete[] _sample;
     cvReleaseMat( &train_resp );
     cvReleaseMat( &result );
     cvReleaseMat( &data );