#include <vector> vector<vector <int> > ivec(m ,vector<int>(n,value));

http://blog.csdn.net/hfengzhi/article/details/48474255

#include <vector>
#include <iostream>
using namespace std;
typedef int date_type;

void main_1()
{
    int number=3,value=5;
    cout<<"please input number value:"<<endl;
    cin>>number>>value;

    //创建,初始值为0.
    //vector<date_type>v;
    //vector<date_type>v(number);
    vector<date_type>v(number,value);

    ////创建m*n的二维vector
    //vector<vector <int> > ivec;
    //ivec.resize(m,vector<int>(n));
    ////m*n的二维vector，所有元素为0
    //vector<vector <int> > ivec(m ,vector<int>(n,0));    


    //下标访问(同数组)
    //迭代器访问
    vector<date_type>::iterator it;  //定义迭代器变量
    for(it=v.begin();it!=v.end();it++)
    {
        cout<<*it<<endl;
    }
}

/*
please input number value:
3 6
6
6
6
请按任意键继续. . .
*/

void main()
{
    int m,n,value;
    cout<<"please input number_m number_n value:"<<endl;
    cin>>m>>n>>value;



    ////创建m*n的二维vector
    //vector<vector <int> > ivec;
    //ivec.resize(m,vector<int>(n));
    //m*n的二维vector，所有元素为0
    vector<vector <int> > ivec(m ,vector<int>(n,value));    


    //下标访问(同数组)
    //迭代器访问
    vector<vector <int> >::iterator it;  //定义迭代器变量
    for(it=ivec.begin();it!=ivec.end();it++)
    {
        vector <int> inner_vec=*it;
        vector <int>::iterator inner_it;
        for (inner_it=inner_vec.begin();inner_it!=inner_vec.end();inner_it++)
        {
            cout<<*inner_it<<" ";
        }
        cout<<endl;
    }
}

/*
please input number_m number_n value:
2 3 4
4 4 4
4 4 4
请按任意键继续. . .
*/

 

void main()
{
    int number=3,value=5;
    cout<<"please input number value:"<<endl;
    cin>>number>>value;

    vector<date_type>v(number,value);
    //下标访问(同数组)
    //迭代器访问
    vector<date_type>::iterator it;  //定义迭代器变量
    for(it=v.begin();it!=v.end();it++)
    {
        cout<<*it<<endl;
    }
    cout<<"------------------"<<endl;
    for (int i=0;i<number;i++)
    {
        v[i]=i+1;
    }
    //
    for (int i=0;i<number;i++)
    {
        cout<<v[i]<<endl;
    }

}

/*
please input number value:
5 3
3
3
3
3
3
------------------
1
2
3
4
5
请按任意键继续. . .
*/

 

int main()
{
    vector<char> v1;
    vector<char>::iterator iter1;
    vector<char>::iterator iter2;
    v1.push_back('m');
    v1.push_back('n');
    v1.push_back('o');
    v1.push_back('p');

    cout << "v1.front() = " << v1.front() << endl;
    cout << "v1.back() = " << v1.back() << endl;



    iter1 = v1.begin();
    cout << *iter1 << endl;
    iter2 = v1.end()-1;    //注意v1.end()指向的是最后一个元素的下一个位置，所以访问最后一个元素

    //的正确操作为：v1.end() - 1;
    cout << *iter2 << endl;

    v1.pop_back();
    cout << "v1.back() = " << v1.back() << endl;
    return 0;
}
/*
v1.front() = m
v1.back() = p
m
p
v1.back() = o
请按任意键继续. . .
*/

 

int main()
{
    vector<char> v1;
    vector<char>::iterator iter1;
    vector<char>::iterator iter2;
    v1.push_back('m');
    v1.push_back('n');
    v1.push_back('o');
    v1.push_back('p');

    v1.insert(v1.begin()+1,'d');//在指针位置插入d
    v1.insert(v1.end()-2,'c');//在指针位置插入c

    int count=v1.size();
    for (int i=0;i<count;i++)
    {
        cout<<v1[i]<<endl;
    }
    return 0;
}

/*
m
d
n
c
o
p
请按任意键继续. . .
*/

 

int main()
{
    vector<char> v1;
    vector<char>::iterator iter1;
    vector<char>::iterator iter2;
    v1.push_back('m');
    v1.push_back('n');
    v1.push_back('o');
    v1.push_back('p');

    v1.erase(v1.begin()+1,v1.begin()+3);//删除区间，左闭右开

    int count=v1.size();
    for (int i=0;i<count;i++)
    {
        cout<<v1[i]<<endl;
    }
    v1.clear();
    cout<<v1.size()<<endl;
    return 0;
}
/*
m
p
0
请按任意键继续. . .
*/

 

#include<algorithm>
//自定义比较排序
bool cmp(int a,int b)
{
    return a>b;
}
void main()
{
    //反序 
    //reverse(v.begin()+n,v.begin()+m);//对两个指针间的数据进行反序
    //快速排序
    //sort(v.begin()+n,v.begin()+m);//对两个指针间的数据进行排序    
    //sort(v.begin()+n,v.begin()+m，cmp);//对两个指针间的数据进行排序
    //
    int number=5;
    vector<date_type>v;
    v.push_back(5);v.push_back(3);v.push_back(4);v.push_back(1);v.push_back(2);
    //下标访问(同数组)
    //迭代器访问
    vector<date_type>::iterator it;  //定义迭代器变量
    for(it=v.begin();it!=v.end();it++)
    {
        cout<<*it<<endl;
    }
    cout<<"------------------"<<endl;
    //
    reverse(v.begin(),v.end());
    for (int i=0;i<number;i++)
    {
        cout<<v[i]<<endl;
    }
    cout<<"------------------"<<endl;
    //
    sort(v.begin(),v.end());
    for (int i=0;i<number;i++)
    {
        cout<<v[i]<<endl;
    }
    cout<<"------------------"<<endl;
    //
    sort(v.begin(),v.end(),cmp);
    for (int i=0;i<number;i++)
    {
        cout<<v[i]<<endl;
    }
    cout<<"------------------"<<endl;
}
/*
5
3
4
1
2
------------------
2
1
4
3
5
------------------
1
2
3
4
5
------------------
5
4
3
2
1
------------------
请按任意键继续. . .
*/