容器嵌套

#include <iostream>

using namespace std;

#include <vector>//容器

#include <algorithm>//算法

void test01()

{

vector <vector <int> >v;//创建容器

vector <int>  v1;

vector <int>  v2;

vector <int>  v3;

vector <int>  v4;

for (int i = 0; i < 4; i++)//填充容器

{

v1.push_back(i + 1);

v2.push_back(i + 2);

v3.push_back(i + 3);

v4.push_back(i + 4);

}

//载入

v.push_back(v1);

v.push_back(v2);

v.push_back(v3);

v.push_back(v4);

//迭代器

//大容器遍历小容器

for (vector<vector<int>>::iterator it = v.begin(); it != v.end(); it++)//大器

{

for (vector<int>::iterator vit = (*it).begin(); vit != (*it).end(); vit++)//小器

{

//*it ==vector <int>

cout << *vit<<" ";

}

cout << endl;

}

}

int main()

{

test01();

system("pause");

return 0;

}