#include <algorithm>
#include <iostream>

int main()
{
  const char *p = "Schreibe: Hallo";
  const char *q = "Schreibe:  Welt";

  std::pair<const char*, const char*> diff = std::mismatch(p, p+15, q);

  std::cout << diff.first << diff.second << '\n';
}