cs-lab34/histogram.cpp

#include <iostream>
#include "histogram.h"
using namespace std;
void find_minmax(const vector<double>& numbers, double& min, double& max)
{
    min = numbers[0];
    max = numbers[0];
    for (double x : numbers)
    {
        if (x > max )
        {
            max = x;
        }
        if (x < min)
        {
            min = x;
        }
    }
}
vector<size_t> make_histogram(const vector<double>& numbers, size_t& bin_count)
{
    double min = 0;
    double max = 0;
    find_minmax(numbers, min, max);
    auto bin_size = (max - min)/bin_count;
    vector<size_t> bins(bin_count);
    for (double number : numbers)
    {
        bool found = false;
        for (size_t j = 0; (j < bin_count - 1) && !found; j++)
        {
             auto lo = min + j * bin_size;
             auto hi = min + (j + 1) * bin_size;
             if ((lo <= number) && (number < hi))
            {
                bins[j]++;
                found = true;
            }
        }
        if (!found) {
            bins[bin_count - 1]++;
        }
    }
    return bins;
}