stl

#include <iostream>
 #include <vector>   //常见6种STL容器 deque list queue  priority_queue  stack  vector
 #include <algorithm>  //通用算法
 #include <fstream>  //文件
 #include <string>using namespace std;
int main()
 {
  cout<<"Hello C++!!\n"; //STL
  //智能数组
  std::vector<int> vec;
  std::vector<int>::iterator itr;
  int i=0;
  for (i=12;i>0;i--)
  {
   vec.push_back(i*3);   }
 //sort
  std::cout<<"before sort:\n";
  for (itr=vec.begin();itr != vec.end();itr++)
  {
   std::cout<<*itr<<std::endl; }
 std::sort(vec.begin(),vec.end());
  std::cout<<"After sort:\n";
  for (itr=vec.begin();itr != vec.end();itr++)
  {
   std::cout<<*itr<<std::endl; }
 std::cin.get();
 //copy
  int ar[6] = {4,5,4,6,4,2};
  std::cout<<"original contents:\n";
  for (itr=vec.begin();itr != vec.end();itr++)
  {
   std::cout<<*itr<<std::endl; }
 itr = vec.begin();
  std::copy(ar,ar+5,itr);
  std::cout<<"after copy() contents:\n";
  for (itr=vec.begin();itr != vec.end();itr++)
  {
   std::cout<<*itr<<std::endl; }
 std::cin.get();
 //test file stream
  std::cout<<"=======================================================\n";
  std::string filename;
  std::cout<<"enter the file name:\n";
  std::cin>>filename;    //ex: c:\ex.txt
  std::ofstream fout(filename.c_str());
  fout<<"write something to this ​​ file!~~2114!@$!@$!@#&%(##@$--=9​​";
  fout.close(); std::ifstream fin(filename.c_str());
  char ch;
  std::cout<<"\nout put the file.\n\n";
  while(fin.get(ch))
  {
   std::cout<<ch;
  }
  fin.close(); std::cin.get();
 return 0;
 }