string的 insert

 // inserting into a string
 #include <iostream>
 #include <string>

 int main ()
 {
   std::string str="to be question";
   std::string str2="the ";
   std::string str3="or not to be";
   std::string::iterator it;

   // used in the same order as described above:
   str.insert(,str2);                 // to be (the )question
   str.insert(,str3,,);             // to be (not )the question
   str.insert(,"that is cool",);    // to be not (that is )the question
   str.insert(,"to be ");            // to be not (to be )that is the question
   str.insert(,,':');               // to be not to be(:) that is the question
   it = str.insert(str.begin()+,','); // to be(,) not to be: that is the question
   str.insert (str.end(),,'.');       // to be, not to be: that is the question(...)
   str.insert (it+,str3.begin(),str3.begin()+); // (or )

   std::cout << str << '\n';
   return ;
 }

string的 insert()