code: пункт 4.1 (объявление make_histogram())

histogram.h

@@ -1,5 +1,9 @@
 #ifndef HISTOGRAM_H_INCLUDED
 #define HISTOGRAM_H_INCLUDED
 
+#include <vector>
+
+std::vector<size_t>
+make_histogram(const std::vector<double>& numbers, size_t bin_count);
 
 #endif // HISTOGRAM_H_INCLUDED