code: конечный результат(масштабирование столбцов)

svg.cpp

@@ -34,14 +34,14 @@ void
 show_histogram_svg(const vector<size_t>& bins) {
     const auto IMAGE_WIDTH = 400;
     const auto IMAGE_HEIGHT = 300;
-    const auto TEXT_LEFT = 20;
+    const auto TEXT_LEFT = IMAGE_WIDTH-30;
     const auto TEXT_BASELINE = 20;
     const auto TEXT_WIDTH = 50;
     const auto BIN_HEIGHT = 30;
     const auto BLOCK_WIDTH = 10;
 
     svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
-
+    auto space = IMAGE_WIDTH - TEXT_WIDTH;
     size_t max_count = bins[0];
     for(size_t x: bins){
         if(x > max_count){
@@ -49,13 +49,24 @@ show_histogram_svg(const vector<size_t>& bins) {
         }
     }
     double top = 0;
-    for (size_t bin : bins) {
-        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, "black", "blue");
-        top += BIN_HEIGHT;
+    if ((max_count*BLOCK_WIDTH) > space){
+        for (size_t bin : bins) {
+            const double bin_width = space * bin / max_count;
+            svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+            svg_rect(TEXT_LEFT - bin_width - 20, top, bin_width, BIN_HEIGHT, "black", "blue");
+            top += BIN_HEIGHT;
+        }
+        svg_end();
+    }
+    else{
+        for (size_t bin : bins) {
+            const double bin_width = BLOCK_WIDTH * bin;
+            svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+            svg_rect(TEXT_LEFT - bin_width - 20, top, bin_width, BIN_HEIGHT, "black", "blue");
+            top += BIN_HEIGHT;
+        }
+        svg_end();
     }
-    svg_end();
 }