code: main

histogram.cpp

@@ -0,0 +1,68 @@
+#include <iostream>
+#include <vector>
+#include <math.h>
+#include "histogram.h"
+
+
+using namespace std;
+
+bool find_minmax(const vector<double>& A, double& min, double& max)
+{
+    bool empt;
+
+    if (A.size() != 0)
+    {
+
+        min = A[0];
+        for (auto i = 0; i < A.size(); i++)
+        {
+            if (A[i] < min)
+            {
+                min = A[i];
+            }
+        }
+
+        max = A[0];
+        for (auto i = 0; i < A.size(); i++)
+        {
+            if (A[i] > max)
+            {
+                max = A[i];
+            }
+        }
+        empt =true;
+    }
+    else
+        empt = false;
+    return empt;
+}
+
+
+vector <size_t> make_histogram(const vector<double>& A, size_t bin)
+{
+    vector<size_t>B(bin);
+    size_t max_count;
+    double max, min;
+    bool empt;
+    find_minmax(A, min, max);
+    double step = (max - min) / (bin);
+
+    for (size_t i = 0; i < A.size(); i++)
+    {
+        for (size_t j = 0; j < bin; j++)
+        {
+            if ((A[i] >= (min + j * step)) && (A[i] < (min + (j + 1)*step)))
+            {
+                B[j]++;
+                break;
+            }
+        }
+    }
+
+    for (size_t i = 0; i < A.size(); i++)
+    {
+        if (A[i] == max)
+            B[bin - 1]++;
+    }
+    return B;
+}

histogram.h

@@ -0,0 +1,9 @@
+#ifndef HISTOGRAM_H_INCLUDED
+#define HISTOGRAM_H_INCLUDED
+
+#include <vector>
+
+std::vector<size_t>
+make_histogram(const std::vector<double>& A, size_t bin);
+
+#endif // HISTOGRAM_H_INCLUDED

main.cpp

@@ -0,0 +1,42 @@
+#include <iostream>
+#include <vector>
+#include <math.h>
+#include "histogram.h"
+#include "text.h"
+#include "svg.h"
+
+using namespace std;
+
+    struct Input {
+    vector<double>A;
+    size_t bin{};
+    };
+
+Input
+input_data()
+{
+    size_t n;
+    cerr<<"Marks: ";
+    cin>>n;
+
+    Input in;
+    in.A.resize(n);
+     for (size_t i=0; i<n; i++)
+    {
+        cerr<<"A["<<i<<"]=";
+        cin>>in.A[i];
+    }
+
+    cerr<<"Rows: ";
+    cin>>in.bin;
+    return in;
+}
+
+int main()
+{
+    Input in = input_data();
+    auto B = make_histogram(in.A, in.bin);
+    show_histogram_svg (B);
+
+    return 0;
+}

svg.cpp

@@ -0,0 +1,64 @@
+#include <math.h>
+#include <iostream>
+#include <conio.h>
+#include <vector>
+#include <string>
+#include "svg.h"
+using namespace std;
+
+void
+svg_begin(double width, double height) {
+    cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
+    cout << "<svg ";
+    cout << "width='" << width << "' ";
+    cout << "height='" << height << "' ";
+    cout << "viewBox='0 0 " << width << " " << height << "' ";
+    cout << "xmlns='http://www.w3.org/2000/svg'>\n";
+}
+
+void
+svg_end() {
+    cout << "</svg>\n";
+}
+void
+svg_text(double left, double baseline, string text) {
+    cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
+}
+
+void
+svg_rect(double x, double y, double width, double height, string  opacity , string stroke, string fill) {
+cout << "<rect x='"<<x<<"' y='"<<y<<"' width='"<<width<<"' height='"<<height<<"' fill-opacity= '"<< opacity<<  "' stroke='"<<stroke<<"' fill='"<<fill<<"' />";
+
+}
+
+
+void
+show_histogram_svg(const vector<size_t>& B) {
+    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 auto MAX_WIDTH = IMAGE_WIDTH-TEXT_WIDTH;
+
+
+    svg_begin(IMAGE_WIDTH,IMAGE_HEIGHT);
+
+    double top = 0;
+    double max_count = B[0];
+    for (size_t i = 0; i < B.size(); i++) {
+        if (B[i] > max_count)
+            max_count = B[i];
+    }
+    for (size_t bin : B) {
+        double opacity = (bin / max_count);
+        const double bin_width = (IMAGE_WIDTH - TEXT_WIDTH)*(bin/max_count);
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, to_string(opacity), "blue", "#9BB0D2");
+        top += BIN_HEIGHT;
+    }
+
+    svg_end();
+}

svg.h

@@ -0,0 +1,8 @@
+#ifndef SVG_H_INCLUDED
+#define SVG_H_INCLUDED
+
+#include <vector>
+void
+show_histogram_svg(const std::vector<size_t>& B);
+
+#endif // SVG_H_INCLUDED

text.cpp

@@ -0,0 +1,29 @@
+#include <iostream>
+#include <vector>
+#include <math.h>
+#include "text.h"
+
+using namespace std;
+
+void show_histogram(vector<size_t>B, size_t bin)
+{
+	for (size_t i = 0; i < bin; i++)
+	{
+		if (B[i] < 10)
+		{
+			cout << "  ";
+		}
+		else if (B[i] < 100)
+		{
+			cout << " ";
+		}
+		cout << B[i] << "|";
+		for (size_t j = 0; j < B[i]; j++)
+		{
+			cout << "*";
+		}
+		cout << endl;
+	}
+	return;
+}
+

text.h

@@ -0,0 +1,6 @@
+#pragma once
+
+#include <vector>
+
+void show_histogram(std::vector<size_t>B, size_t bin);
+