C++ Primer Plus

Other Modifying Methods: copy() and swap()

The copy() method copies a string object, or part thereof, to a designated character array:

size_type copy(charT* s, size_type n, size_type pos = 0) const;

In this case, s points to the destination array, n indicates the number of characters to copy, and pos indicates the position in the string object from which copying begins. Copying proceeds for n characters or until the last character in the string object, whichever comes first. The function returns the number of characters copied. The method does not append a null character, and it is up to the programmer to see that the array is large enough to hold the copy.

Caution

The copy() method does not append a null character, nor does it check whether ...