Adding comparison with stdlib cpp implementation

Author: SamSyntax

Makefile

@@ -1,2 +1,5 @@
 run:
 	cc -Wall -Wextra -ggdb -pedantic -o bit ./main.c && ./bit ./t8.shakespeare.txt
+
+runCpp:
+	g++ -Wall -Wextra -ggdb -pedantic -o hashcpp ./hash.cpp && ./hashcpp ./t8.shakespeare.txt

hash.cpp

@@ -0,0 +1,63 @@
+#include <algorithm>
+#include <chrono>
+#include <cstddef>
+#include <cstdlib>
+#include <cstring>
+#include <fstream>
+#include <iomanip>
+#include <ios>
+#include <iostream>
+#include <iterator>
+#include <sstream>
+#include <stdio.h>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+void tokenize(const std::string &input,
+              std::unordered_map<std::string, size_t> &hash_table) {
+  if (input.empty())
+    return;
+  std::istringstream stream(input);
+  std::string token;
+  while (stream >> token) {
+    hash_table[token]++;
+  }
+}
+
+int main(int argc, char *argv[]) {
+  std::unordered_map<std::string, size_t> hash_table{};
+  if (argc < 2)
+    return 1;
+  std::ifstream ifs(argv[1]);
+  if (!ifs.is_open()) {
+    std::cerr << "Error: Could not open file '" << argv[1] << "'\n";
+    return 1;
+  }
+
+  std::string content((std::istreambuf_iterator<char>(ifs)),
+                      (std::istreambuf_iterator<char>()));
+
+  ifs.close();
+  auto start = std::chrono::high_resolution_clock::now();
+
+  tokenize(content, hash_table);
+
+  auto end = std::chrono::high_resolution_clock::now();
+  auto duration = std::chrono::duration<double>(end - start);
+  std::cout << "Token counts:\n";
+  std::vector<std::pair<std::string, size_t>> sorted_tokens(hash_table.begin(),
+                                                            hash_table.end());
+  std::sort(sorted_tokens.begin(), sorted_tokens.end(),
+            [](const auto &a, const auto &b) { return a.second > b.second; });
+
+  std::cout << "\nTop 10 most frequent tokens:\n";
+  for (int i = 0; i < std::min(10, (int)sorted_tokens.size()); i++) {
+    std::cout << sorted_tokens[i].first << ": " << sorted_tokens[i].second
+              << std::endl;
+  }
+  std::cout << std::fixed << std::setprecision(6);
+  std::cout << "Time elapsed: " << duration.count() << std::endl;
+
+  return 0;
+}

hashcpp

@@ -72,11 +72,11 @@ void test_naive(char *content, hash_table *naive_table) {
 }
 
 int main(int argc, char **argv) {
+  if (argc < 2)
+    return 1;
   char *content = read_file(argv[1], "r");
   if (!content)
     return 1;
-  if (argc < 2)
-    return 1;
   void *table = malloc(TABLE_SIZE * sizeof(token_t));
   void *naive_table = malloc(TABLE_SIZE * sizeof(token_t));
   hash_table hash_table_impl = {