vector push_back c++ example

/******************************************************************* * File : using-vector.cpp * Author : Team ccplusplus * Description : vector push_back c++ example * Date : PM 10:23 09 May 2012 * Source : http://www.ccplusplus.com/p/c_15.html * Note : *******************************************************************/ #include <iostream> #include <iterator> #include <vector> #include <string> #include <algorithm> using namespace std; int main() { //create empty vector for strings vector<string> sentence; //reserve memory for five elements to avoid reallocation sentence.reserve(5); //append some elements sentence.push_back("Hello,"); sentence.push_back("how"); sentence.push_back("are"); sentence.push_back("you"); sentence.push_back("?"); //print elements separated with spaces copy (sentence.begin(), sentence.end(), ostream_iterator<string>(cout," ")); cout << endl; //print ''technical data'' cout << " max_size(): " << sentence.max_size() << endl; cout << " size(): " << sentence.size() << endl; cout << " capacity(): " << sentence.capacity() << endl; //swap second and fourth element swap (sentence[1], sentence [3]); //insert element "always" before element "?" sentence.insert (find(sentence.begin(),sentence.end(),"?"), "always"); //assign "!" to the last element sentence.back() = "!"; //print elements separated with spaces copy (sentence.begin(), sentence.end(), ostream_iterator<string>(cout," ")); cout << endl; //print "technical data" again cout << " max_size(): " << sentence.max_size() << endl; cout << " size(): " << sentence.size() << endl; cout << " capacity(): " << sentence.capacity() << endl; return 0; } /* * OUTPUT * [blog@ccplusplus vector]$ c++ using-vector.cpp -o using-vector [blog@ccplusplus vector]$ ./using-vector Hello, how are you ? max_size(): 2305843009213693951 size(): 5 capacity(): 5 Hello, you are how always ! max_size(): 2305843009213693951 size(): 6 capacity(): 10 [blog@ccplusplus vector]$ */