#include<bits/stdc++.h>
using namespace std;
int main()
{
/*
int N=5,M=3
1.vector创建一个二维数组总是:
vector<vector<int>> array(N);
for (int i = 0; i < array.size(); i++)
array[i].resize(M);
2.方法2
N行,每行M个元素(一维数组),元素初始化=0
vector<vector<int> > array(N, vector<int>(M,0));
3.二维vector的遍历
需要定义的迭代器:
二维:vector<vector<int>>::iterator iter;
一维:vector<int>::iterator it;
还需要定义一个一维vector 来存储每一行
vector<int> vec_tmp;
4.基于3的输出:
for(iter = array.begin(); iter != array.end(); iter++)
{
vec_tmp = *iter;
for(it = vec_tmp.begin(); it !=vec_tmp.end(); it++)
cout << *it << " ";
cout << endl;
}
5.实现对二维的初始化:
for(i = 0; i < array.size(); i++)
{
for (j = 0; j < array[0].size();j++)
{
array[i][j] = (i+1)*(j+1);
}
}
*/
vector<vector<int> > array(5, vector<int>(3,0));
vector<int>::iterator it;
vector<vector<int> >::iterator iter;
vector<int> vec_tmp;
for(iter = array.begin(); iter != array.end(); iter++)
{
vec_tmp = *iter;
for(it = vec_tmp.begin(); it !=vec_tmp.end(); it++)
cout << *it << " ";
cout << endl;
}
}
using namespace std;
int main()
{
/*
int N=5,M=3
1.vector创建一个二维数组总是:
vector<vector<int>> array(N);
for (int i = 0; i < array.size(); i++)
array[i].resize(M);
2.方法2
N行,每行M个元素(一维数组),元素初始化=0
vector<vector<int> > array(N, vector<int>(M,0));
3.二维vector的遍历
需要定义的迭代器:
二维:vector<vector<int>>::iterator iter;
一维:vector<int>::iterator it;
还需要定义一个一维vector 来存储每一行
vector<int> vec_tmp;
4.基于3的输出:
for(iter = array.begin(); iter != array.end(); iter++)
{
vec_tmp = *iter;
for(it = vec_tmp.begin(); it !=vec_tmp.end(); it++)
cout << *it << " ";
cout << endl;
}
5.实现对二维的初始化:
for(i = 0; i < array.size(); i++)
{
for (j = 0; j < array[0].size();j++)
{
array[i][j] = (i+1)*(j+1);
}
}
*/
vector<vector<int> > array(5, vector<int>(3,0));
vector<int>::iterator it;
vector<vector<int> >::iterator iter;
vector<int> vec_tmp;
for(iter = array.begin(); iter != array.end(); iter++)
{
vec_tmp = *iter;
for(it = vec_tmp.begin(); it !=vec_tmp.end(); it++)
cout << *it << " ";
cout << endl;
}
}