"Erase usage in STL string"

http://blog.csdn.net/leolin_/article/details/7315975

The erase function is prototyped as follows:
(1) string& erase (size_t pos = 0, size_t n = NPOs);
(2) Iterator erase (iterator position);
(3) Iterator erase (iterator first, iterator last);
That means there are three ways to use:
(1) Erase (pos,n); Deleting n characters starting from POS, such as erase (0,1), deletes the first character
(2) Erase (position); Deletes a character at position (position is a string type of iterator)
(3) Erase (first,last); Delete the characters from first to last (both first and last are iterators)
Let me give you an example:

[CPP] View plain copy// string::erase   #include  <iostream>   #include  < string>   using namespace std;      int main  ()    {      string str  ("this is an example phrase.");      string::iterator it;        //  (1) Usage       str.erase  (10,8);     cout << str <<  endl;        //  "This is an phrase."         //  Section (2) Usage      it=str.begin () +9;      str.erase  (IT);     cout << str << endl;         //  "This is a phrase."         //  (3) typeLaw      str.erase  (Str.begin () +5, str.end () -7);     cout  << str << endl;        //  "this  Phrase. "      return 0;  }