【STL】- vector的用法

初始化：

1. 默认构造：

vector<int> vint;

2. 用包含10个元素的数组初始化：

vector<int> vint(ia, ia+10);

算法：

1. vint.push_back(i);

2. vint.size();

3. vint[i];

4. vint.erase(pos1, pos2);

 代码：

#include <vector>
#include <iostream>
#include <iterator>
using namespace std;

int ia[] = {1,2,3,4,5,6,7,8,9,10, 11,12};

int main() {
    //initialize
    vector<int> vint1;
    vector<int> vint2(ia, ia+10);

    //push_back()
    for(int i = 0; i <=6; ++i)
        vint1.push_back(i);

    //no push_front()
    //vint1.push_front(222);

    //size()
    cout << "The size of vint1 is: " << vint1.size() << endl;

    //[] operator
    for(int i = 0; i < vint2.size(); i++)
        cout << vint2[i] << endl;

    vint2.erase(vint2.begin()+3, vint2.end());

    copy(vint2.begin(), vint2.end(), ostream_iterator<int>(cout, " "));

    return 0;
}

输出：

$ ./a.exe
The size of vint1 is: 7
1
2
3
4
5
6
7
8
9
10
1 2 3