solve hw-9

hws/tiktok_trends/SoundInfo.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <string>
+#include "TopKVideoHolder.h"
+
+struct SoundInfo {
+    const std::string* musicId = nullptr;
+    const std::string* musicName = nullptr;
+    const std::string* musicAuthor = nullptr;
+    long totalViews = 0;
+    TopKVideoHolder topVideos;
+
+    SoundInfo() = default;
+
+    SoundInfo(const std::string* id, const std::string* name, const std::string* author)
+        : musicId(id), musicName(name), musicAuthor(author), totalViews(0) {}
+};
+
+struct CompareSoundPtr {
+     bool operator()(const SoundInfo* a, const SoundInfo* b) const {
+        if (a->totalViews != b->totalViews) return a->totalViews > b->totalViews;
+        if (a->musicId && b->musicId) return *a->musicId < *b->musicId;
+        if (a->musicId) return true;
+        return false;
+     }
+};
+
+struct CompareSoundPtrForHeap {
+     bool operator()(const SoundInfo* a, const SoundInfo* b) const {
+        if (a->totalViews != b->totalViews) return a->totalViews > b->totalViews;
+        if (a->musicId && b->musicId) return *a->musicId > *b->musicId;
+        if (a->musicId) return false;
+        return true;
+     }
+};