find the position of letter in cpp code example

Example 1: string .find in c++

std::string t = "Banana Republic";
std::string s = "nana";

std::string::size_type i = t.find(s);

if (i != std::string::npos)
   t.erase(i, s.length());

Example 2: find in string c++

size_t find (const string& str, size_t pos = 0) const;