从给定的句子中找出以给定词为前缀的词

#include <iostream>
#include <string>
#include <vector>

using namespace std;

int main() {
   string sentence, prefix;
   vector<string> words;
   
   // Read in the input sentence and prefix
   sentence="The quick brown fox jumps over the lazy dog";
   prefix="fox";
   
   // Tokenize the input sentence into individual words
   string word = "";
   for (auto c : sentence) {
      if (c == ' ') {
         words.push_back(word);
         word = "";
      }
      else {
         word += c;
      }
   }
   words.push_back(word);

   // Find all words in the sentence that start with the given prefix
   vector<string> matches;
   for (auto w : words) {
      if (w.substr(0, prefix.length()) == prefix) {
         matches.push_back(w);
      }
   }
   
   // Print the list of matching words
   cout << "Matching words:" << endl;
   for (auto m : matches) {
      cout << m << endl;
   }
   
   return 0;
}

Matching words:
fox

The quick brown fox jumps over the lazy dog