code вариант 4

project/percent.cpp

@@ -0,0 +1,16 @@
+#include "percent.h"
+
+#include <vector>
+using namespace std;
+
+void
+percent(const vector<size_t>& bins, vector<size_t>&bins_percent){
+    size_t number_count = 0;
+    size_t bin_count = bins.size();
+    for (size_t bin : bins){
+        number_count=number_count+bin;
+    }
+    for (int i=0; i<bin_count; i++){
+        bins_percent.push_back(bins[i]*100/number_count);
+    }
+}

project/percent.h

@@ -0,0 +1,10 @@
+#ifndef PERCENT_H_INCLUDED
+#define PERCENT_H_INCLUDED
+
+#include <vector>
+using namespace std;
+
+void
+percent(const vector<size_t>& bins, vector<size_t>&bins_percent);
+
+#endif // PERCENT_H_INCLUDED

project/show_histogram.cpp

@@ -1,4 +1,5 @@
 #include "svg.h"
+#include "percent.h"
 
 void
 show_histogram_svg(const vector<size_t>& bins) {
@@ -10,8 +11,13 @@ show_histogram_svg(const vector<size_t>& bins) {
     const auto BIN_HEIGHT = 30;
     const auto BLOCK_WIDTH = 10;
     svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
+
+
     double top = 0;
     size_t longest;
+    vector<size_t>bins_percent{};
+
+
     if (!bins.empty()) {
         longest = bins[0];
     } else {
@@ -26,7 +32,7 @@ show_histogram_svg(const vector<size_t>& bins) {
             const double bin_width = BLOCK_WIDTH * bin;
             if (bin == longest){
                 svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
-                svg_rect(TEXT_WIDTH, top, IMAGE_WIDTH - TEXT_WIDTH, BIN_HEIGHT, "#000000", "#ff00a2");
+                svg_rect(TEXT_WIDTH, top, IMAGE_WIDTH - 2*TEXT_WIDTH, BIN_HEIGHT, "#000000", "#ff00a2");
                 top += BIN_HEIGHT;
             } else{
                 svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
@@ -34,5 +40,11 @@ show_histogram_svg(const vector<size_t>& bins) {
                 top += BIN_HEIGHT;
             }
     }
+    top = 0;
+    percent(bins, bins_percent);
+    for (size_t bin_percent : bins_percent){
+            svg_text(IMAGE_WIDTH - TEXT_WIDTH + TEXT_LEFT, top + TEXT_BASELINE, to_string(bin_percent)+"%");
+            top += BIN_HEIGHT;
+    }
     svg_end();
 }

project/unittest.cpp

@@ -2,8 +2,9 @@
 #define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
 #include "doctest.h"
 #include "histogram_internal.h"
+#include "percent.h"
 
-TEST_CASE("distinct positive numbers") {
+TEST_CASE("distinct empty") {
     double min = 0;
     double max = 0;
     find_minmax({}, min, max);
@@ -17,24 +18,30 @@ TEST_CASE("distinct positive numbers") {
     CHECK(min == 1);
     CHECK(max == 2);
 }
-TEST_CASE("distinct positive numbers") {
+TEST_CASE("distinct single") {
     double min = 0;
     double max = 0;
     find_minmax({1}, min, max);
     CHECK(min == 1);
     CHECK(max == 1);
 }
-TEST_CASE("distinct positive numbers") {
+TEST_CASE("distinct same") {
     double min = 0;
     double max = 0;
     find_minmax({1,1,1,1,1,1,1,1,1}, min, max);
     CHECK(min == 1);
     CHECK(max == 1);
 }
-TEST_CASE("distinct positive numbers") {
+TEST_CASE("distinct negative numbers") {
     double min = 0;
     double max = 0;
     find_minmax({-1.5,-2,-3,-4}, min, max);
     CHECK(min == -4);
     CHECK(max == -1.5);
 }
+TEST_CASE("percent 1") {
+    const vector<size_t>bins{5, 10, 10, 50, 25};
+    vector<size_t>bins_percent{};
+    percent(bins, bins_percent);
+    CHECK(bins_percent[0] == 5);
+}