cs-lab34/histogram.cpp

#include <vector>
#include <math.h>
#include <iostream>
#include <conio.h>
#include "histogram.h"
using namespace std;
static void find_minmax(const vector<double>& numbers, double& min, double& max) {
    min = numbers[0];
    max = numbers[0];
	for (double x : numbers){
		if (x < min){
			min = x;
		}
		else if (x > max){
            max = x;
		}
	}
}
vector<size_t> make_histogram(const vector<double>& numbers, size_t& bin_count){
    double min, max;
	find_minmax(numbers, min, max);
	vector<size_t> bins(bin_count);
	double bin_size = (max - min) / bin_count;
	size_t number_count;
	for (size_t i = 0; i < numbers.size(); i++){
		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 <= numbers[i]) && (numbers[i] < hi)){
				bins[j]++;
				found = true;
			}
		}
		if (!found){
			bins[bin_count - 1]++;
		}
	}
    return bins;
}