Split a string in C++

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

using namespace std;

vector<string> split(const string& s, char delimiter) {
   vector<string> tokens;
   string token;
   istringstream tokenStream(s);
   while (getline(tokenStream, token, delimiter)) {
      tokens.push_back(token);
   }
   return tokens;
}

int main() {
  string a = "";
  string b = "ab^cd";
  string c = "ab^cd^ef";
  char delimiter = '^';

  vector<string> aSplit = split(a, delimiter);
  vector<string> bSplit = split(b, delimiter);
  vector<string> cSplit = split(c, delimiter);

  cout << "split a:" << endl;
  for (auto it = aSplit.begin(); it < aSplit.end(); ++it) {
    cout << *it << endl;
  }
  cout << "split b:" << endl;
  for (auto it = bSplit.begin(); it < bSplit.end(); ++it) {
    cout << *it << endl;
  }
  cout << "split c:" << endl;
  for (auto it = cSplit.begin(); it < cSplit.end(); ++it) {
    cout << *it << endl;
  }
}