#include 
#include 

using namespace std;

template
void removeSubstrs(basic_string& s,
                   const basic_string& p) {
   basic_string::size_type n = p.length();

   for (basic_string::size_type i = s.find(p);
        i != basic_string::npos;
        i = s.find(p))
      s.erase(i, n);
}

int main() {
   string s = "One fish, two fish, red fish, blue fish";
   string p = "fish";

   removeSubstrs(s, p);

   cout << s << '\n';
}
The basic_string member func