copy string not from beginning

I want to copy a string without the first four characters. It doesn't matter weather or not it's c or c++ style strings.

Start copying at foo[4].

Code:

//For std::string
std::copy(str.begin()+4,str.end(),copytoItr);
//for c-string
std::copy(str+4,str+STR_LEN,copytoItr);

Code:

std::string oldstring("Hey there!");
std::string newstring(oldstring.substr(4));  // newstring = "there!"