cs-lab03/main.cpp

#include <iostream>
#include <vector>
using namespace std;

struct Input
{
    vector<double> numbers;
    size_t bin_count;
};
Input
input_data()
{
    size_t number_count;
    cin >> number_count;
    Input in;
    in.numbers.resize(number_count);
    for (size_t i = 0; i < number_count; i++)
    {
        cin >> in.numbers[i];
    }
    size_t bin_count;
    cin >> bin_count;
    return in;
}

void
find_minmax(const vector<double>& numbers, double& min, double& max)
{
    min = numbers[0];
    max = numbers[0];
    for ( size_t i=0; i < numbers.size(); i++)
    {
        if (numbers[i] > max) max=numbers[i];
        if (numbers[i] < min) min=numbers[i];
    }
};

std::vector<long long unsigned int>
make_histogram(const vector<double>& numbers,size_t bin_count)
{
    float lo,hi,dif;
    double min, max;
    find_minmax(numbers, min, max);
    vector <size_t> bins(bin_count) ;
    dif=(max - min)/bin_count;
    for(int i=0; i < numbers.size(); i++)
    {
        bool found = false;
        for (int j=0; (j < bin_count-1)&&!found; j++)
        {
            lo= min + j*dif;
            hi= min + (j+1)*dif;
            if ((lo <= numbers[i]) && (numbers[i] <hi ))
            {
                bins[j]++;
                found = true;
            }
        }
        if (!found)
        {
            bins[bin_count - 1]++;
        }
    }
    return bins;
}
void show_histogram_text(vector <size_t> &bins)
{
    for (size_t i=0; i<bins.size(); i++)
    {
        if (bins[i]!=0)
        {
            cout<<bins[i]<<" | "  ;
            for (size_t j=0; j<bins[i]; j++)
            {
                cout<<"*";
            }
            cout<<endl;
        }
    }
}
int main()
{
    auto in = input_data();
    auto bins = make_histogram(in.numbers, in.bin_count);
    show_histogram_text(bins);


    return 0;
}