Hashmaps

unordered map.cpp

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+#include <iostream>
+#include <string>
+#include <unordered_map>
+#include <sstream>
+
+int main() {
+    std::string text = "This is a sample text. This is a simple example.";
+
+    // Create an unordered_map to store word frequencies
+    std::unordered_map<std::string, int> wordFrequency;
+
+    // Tokenize the text into words
+    std::istringstream iss(text);
+    std::string word;
+
+    while (iss >> word) {
+        // Remove punctuation and convert to lowercase (you may need a more comprehensive approach)
+        for (char& c : word) {
+            if (std::ispunct(c)) {
+                c = ' ';
+            }
+            else {
+                c = std::tolower(c);
+            }
+        }
+
+        // Increment the frequency in the map
+        if (!word.empty()) {
+            wordFrequency[word]++;
+        }
+    }
+
+    // Display the word frequencies
+    for (const auto& pair : wordFrequency) {
+        std::cout << pair.first << ": " << pair.second << std::endl;
+    }
+
+    return 0;
+}