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85 строки
2.2 KiB
C++
85 строки
2.2 KiB
C++
#include <iostream>
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#include "svg.h"
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using namespace std;
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// Ôóíêöèÿ çàãîëîâêà.
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void svg_begin(double width, double height)
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{
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cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
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cout << "<svg ";
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cout << "width='" << width << "' ";
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cout << "height='" << height << "' ";
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cout << "viewBox='0 0 " << width << " " << height << "' ";
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cout << "xmlns='http://www.w3.org/2000/svg'>\n";
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}
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// Ôóíêöèÿ îêîí÷àíèÿ.
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void svg_end()
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{
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cout << "</svg>\n";
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}
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// Ôóíêöèÿ âûâîäà ñòðîêè.
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void svg_text(double left, double baseline, string text)
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{
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cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
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}
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// Ôóíêöèÿ âûâîäà ïðÿìîóãîëüíèêà.
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void svg_rect(double x, double y, double width, double height, string stroke, string fill)
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{
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cout << "<rect x='" << x << "' y='" << y << "' width='" << width;
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cout << "' height='" << height << "' stroke='" << stroke << "' fill='" << fill << "'/>";
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}
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// Ñîçäàíèå ãèñòîãðàììû íà îñíîâàíèè êîðçèí â ôîðìàòå SVG.
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void show_histogram_svg(const vector<size_t>& bins)
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{
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// Íåîáõîäèìûå êîíñòàíòû.
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const auto IMAGE_WIDTH = 400;
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const auto IMAGE_HEIGHT = 300;
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const auto TEXT_LEFT = 20;
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const auto TEXT_BASELINE = 20;
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const auto TEXT_WIDTH = 50;
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const auto BIN_HEIGHT = 30;
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// const auto BLOCK_WIDTH = 10
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size_t max_bins = bins[0];
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svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
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// Ïîèñê ìàêñèìàëüíîé êîðçèíû.
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for (size_t x: bins)
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if (x > max_bins)
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max_bins = x;
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// Ïðîâåðêà ìàêñèìàëüíîãî çíà÷åíèÿ è ñîçäàíèå ãèñòîãðàììû.
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if (max_bins == 0)
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{
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string message = "The count of numbers or columns is zero.";
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svg_text(TEXT_LEFT, TEXT_BASELINE, message);
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}
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else
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{
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const auto BLOCK_WIDTH = (IMAGE_WIDTH - TEXT_WIDTH)/max_bins;
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double top = 0;
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for (size_t bin : bins)
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{
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const double bin_width = BLOCK_WIDTH * bin;
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svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
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svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
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top += BIN_HEIGHT;
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}
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}
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svg_end();
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}
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