c++ vector 使用

1. 包含一个头文件：

1　　#include <vector>

2. 申明及初始化：

1   std::vector<int> first;                                // empty vector of ints
2   std::vector<int> second (4,100);                       // four ints with value 100
3   std::vector<int> third (second.begin(),second.end());  // iterating through second
4   std::vector<int> fourth (third);                       // a copy of third

3. 添加元素：

1 　v[0] = 3; //直接赋值
2 　v.insert(v.begin(),8);   //在最前面的元素前插入8  
3 　v.insert(v.begin()+2,1);  //在第二个元素前插入新元素1
4 　v.insert(v.end(),3);  //在末尾插入新元素1

4. 删除元素：

5. 访问元素：

6. member functions：

　vector::assign
   vector::at
   vector::back
   vector::begin
   vector::capacity
   vector::cbegin
   vector::cend
   vector::clear
   vector::crbegin
   vector::crend
   vector::data
   vector::emplace
   vector::emplace_back
   vector::empty
   vector::end
   vector::erase
   vector::front
   vector::get_allocator
   vector::insert
   vector::max_size
   vector::operator=
   vector::operator[]
   vector::pop_back
   vector::push_back
   vector::rbegin
   vector::rend
   vector::reserve
   vector::resize
   vector::shrink_to_fit
   vector::size
   vector::swap