code: заготовка кода

.gitignore

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+cs-lab34.cbp
+cs-lab34.depend
+unittest.cbp
+/bin
+/obj

cs-lab34.layout

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+<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
+<CodeBlocks_layout_file>
+	<FileVersion major="1" minor="0" />
+	<ActiveTarget name="Debug" />
+	<File name="main.cpp" open="1" top="0" tabpos="1" split="0" active="1" splitpos="0" zoom_1="0" zoom_2="0">
+		<Cursor>
+			<Cursor1 position="143" topLine="0" />
+		</Cursor>
+	</File>
+</CodeBlocks_layout_file>

histogram.cpp

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+#include "histogram.h"
+#include <vector>
+
+void find_minmax(const std::vector <double> &numbers, double &min, double &max, bool &res ){
+
+    if (numbers.size()==0){
+        res = true;
+        return;
+    }
+
+    min = numbers[0];
+    max = numbers[0];
+    for ( double x : numbers ){
+        if ( x < min ){
+            min = x;
+        } else if ( x > max ){
+            max = x;
+        }
+    }
+}
+
+std::vector<std::size_t> make_histogram(const std::vector<double> &numbers, std::size_t bin_count) {
+    double min, max;
+    bool res = false;
+    find_minmax(numbers, min, max, res);
+    double bin_size = ( max - min ) / bin_count;
+    std::vector<std::size_t> bins ( bin_count );
+    for (std::size_t i=0; i <  numbers.size(); i++ ){
+        bool found = false;
+        for (std::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;
+}

histogram.h

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+#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

main.cpp

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+#include <iostream>
+#include <vector>
+#include "histogram.h"
+#include "text.h"
+#include "svg.h"
+
+using namespace std;
+
+
+struct Input {
+    vector<double> numbers;
+    size_t bin_count{};
+};
+
+Input input_data() {
+
+    size_t number_count;
+
+    cerr << "Enter number count: ";
+    cin >> number_count;
+
+    Input in;
+
+    cerr << "Enter number of bins: ";
+    cin >> in.bin_count;
+
+    in.numbers.resize(number_count);
+
+    cerr << "Enter numbers: ";
+    for (size_t i = 0; i < number_count; i++)
+    {
+        cin >> in.numbers[i];
+    }
+
+    return in;
+}
+
+
+
+
+int main(){
+
+    bool res = false;
+
+    Input in = input_data();
+
+    auto bins = make_histogram(in.numbers, in.bin_count);
+
+    show_histogram_svg(bins);
+
+
+    }

svg.cpp

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+#include <iostream>
+#include <vector>
+#include "svg.h"
+
+void
+svg_begin(double width, double height) {
+    std::cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
+    std::cout << "<svg ";
+    std::cout << "width='" << width << "' ";
+    std::cout << "height='" << height << "' ";
+    std::cout << "viewBox='0 0 " << width << " " << height << "' ";
+    std::cout << "xmlns='http://www.w3.org/2000/svg'>\n";
+}
+
+void
+svg_end() {
+    std::cout << "</svg>\n";
+}
+
+void
+svg_text(double left, double baseline, std::string text) {
+     std::cout << "<text x='" << left << "' y='"<< baseline << "' > " << text << " </text>";
+}
+
+void svg_rect(double x, double y, double width, double height){
+        std::cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height << " ' stroke='black' fill='#33A220' ></rect>";
+}
+
+void
+show_histogram_svg(const std::vector<std::size_t>& bins) {
+
+    const auto IMAGE_WIDTH = 400;
+    const auto IMAGE_HEIGHT = 300;
+    const auto TEXT_LEFT = 20;
+    const auto TEXT_BASELINE = 20;
+    const auto TEXT_WIDTH = 50;
+    const auto BIN_HEIGHT = 30;
+    const auto BLOCK_WIDTH = 10;
+    const std::size_t MAX_ASTERISK = IMAGE_WIDTH - TEXT_WIDTH;
+    svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
+    double top = 0;
+
+    std::size_t maxbin=bins[0];
+    for (std::size_t i=0; i < bins.size(); i++){
+        if (maxbin < bins[i]){
+            maxbin=bins[i];
+        }
+    }
+
+    if (maxbin<=76){
+        for (std::size_t i=0; i < bins.size(); i++) {
+            double bin_width = BLOCK_WIDTH * bins[i];
+            svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bins[i]));
+            svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
+            top += BIN_HEIGHT;
+        }
+        svg_end();
+    } else {
+        for (std::size_t i=0; i < bins.size(); i++) {
+            double bin_width= MAX_ASTERISK * (static_cast<double>(bins[i]) / maxbin);
+            svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bins[i]));
+            svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
+            top += BIN_HEIGHT;
+        }
+        svg_end();
+    }
+}

svg.h

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+#ifndef SVG_H_INCLUDED
+#define SVG_H_INCLUDED
+
+#include <vector>
+
+void
+show_histogram_svg(const std::vector<std::size_t>& bins);
+
+#endif // SVG_H_INCLUDED

text.cpp

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+#include <iostream>
+#include <vector>
+#include "text.h"
+
+const std::size_t SCREEN_WIDTH = 80;
+const std::size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+
+void show_histogram_text(const std::vector<std::size_t> &bins){
+    std::size_t maxbin = bins[0];
+    for (std::size_t i=1; i < bins.size(); i++){
+        if (maxbin < bins[i]){
+            maxbin = bins[i];
+        }
+    }
+    if (maxbin <= MAX_ASTERISK){
+        for (size_t i=0; i < bins.size(); i++ ){
+            if (bins[i] < 10 ){
+                std::cout << "  " << bins[i] << "|";
+            } else if (bins[i] < 100) {
+                std::cout << " " << bins[i] << "|";
+            } else if (bins[i] < 1000) {
+                std::cout << bins[i] << "|";
+            }
+            for (size_t j=0; j < bins[i]; j++ ){
+                std::cout << "*";
+            }
+            std::cout << std::endl;
+        }
+    } else {
+        for (std::size_t i=0; i < bins.size(); i++){
+            std::size_t heightG= MAX_ASTERISK * (static_cast<double>(bins[i]) / maxbin);
+            if (bins[i] < 10 ){
+                std::cout << "  " << bins[i] << "|";
+            } else if (bins[i] < 100) {
+                std::cout << " " << bins[i] << "|";
+            } else if (bins[i] < 1000) {
+                std::cout << bins[i] << "|";
+            }
+            for (std::size_t j=0; j < heightG; j++ ){
+                std::cout << "*";
+            }
+            std::cout << std::endl;
+        }
+    }
+}

text.h

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+#ifndef TEXT_H_INCLUDED
+#define TEXT_H_INCLUDED
+
+#include <vector>
+
+void show_histogram_text(const std::vector <std::size_t> &bins);
+
+#endif // TEXT_H_INCLUDED