keep码
度过大难,将有大成。 继续努力,终成大器。
#include<iostream>
#include<string>
#include<vector>
#include<algorithm>//标准算法头文件
using namespace std;

//vector容器存放内置数据类型

void myPrint(int val)
{
    cout << val << endl;
}


void test01()
{
    //创建了一个vector容器,  数组
    vector<int>v;

    //向容器中插入数据
    v.push_back(10);
    v.push_back(20);
    v.push_back(30);
    v.push_back(40);

    //通过迭代器访问容器中的数据
    //vector<int>::iterator itBegin = v.begin();//起始迭代器   指向容器中第一个元素
    //vector<int>::iterator itEnd = v.end();  //结束迭代器  指向容器中最后一个元素的下一个位置

    ////第一种遍历
    //while (itBegin != itEnd)
    //{
    //    cout << *itBegin << endl;
    //    itBegin++;
    //}

    //第二种遍历方式
    /*for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
    {
        cout << *it << endl;
    }*/


    //第三种遍历方式  利用STL提供遍历算法
    for_each(v.begin(), v.end(), myPrint);

}


int main()
{
    test01();
    

    system("pause");

    return 0;
}

 

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

//vector容器中存放自定义数据类型
class Person
{
public:
    Person(string name, int age)
    {
        this->m_Name = name;
        this->m_Age = age;
    }
    string m_Name;
    int m_Age;
};

void test01()
{
    vector<Person>v;

    Person p1("aaa", 10);
    Person p2("bbb", 20);
    Person p3("ccc", 30);
    Person p4("ddd", 40);
    Person p5("eee", 50);

    //向容器中添加数据
    v.push_back(p1);
    v.push_back(p2);
    v.push_back(p3);
    v.push_back(p4);
    v.push_back(p5);

    //遍历容器中的数据
    for (vector<Person>::iterator it = v.begin(); it != v.end(); it++)
    {
        //cout << "姓名: " << (*it).m_Name << "年龄: " << (*it).m_Age << endl;
        cout << "姓名: " << it->m_Name << "年龄: " <<  it->m_Age << endl;
    }
}


//存放自定义数据类型  指针
void test02()
{
    vector<Person*>v;

    Person p1("aaa", 10);
    Person p2("bbb", 20);
    Person p3("ccc", 30);
    Person p4("ddd", 40);
    Person p5("eee", 50);

    //向容器中添加数据
    v.push_back(&p1);
    v.push_back(&p2);
    v.push_back(&p3);
    v.push_back(&p4);
    v.push_back(&p5);

    //遍历容器
    for (vector<Person*>::iterator it = v.begin(); it != v.end(); it++)
    {
        cout << "姓名: " << (*it)->m_Name << "年龄: " << (*it)->m_Age << endl;

    }
}




int main()
{

    //test01();

    test02();

    system("pause");

    return 0;
}

 

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


//容器嵌套容器
void test01()
{
    vector<vector<int>>v;

    //创建小容器
    vector<int>v1;
    vector<int>v2;
    vector<int>v3;
    vector<int>v4;
    

    //向小容器添加数据
    for (int i = 0; i < 4; i++)
    {
        v1.push_back(i + 1);
        v2.push_back(i + 2);
        v3.push_back(i + 3);
        v4.push_back(i + 4);
    }

    //将小容器插入大容器中
    v.push_back(v1);
    v.push_back(v2);
    v.push_back(v3);
    v.push_back(v4);

    //通过大容器,把所有数据遍历一遍
    for (vector<vector<int>>::iterator it = v.begin(); it != v.end(); it++)
    {
        //(*it) ---------容器vector<int>
        for (vector<int>::iterator vit = (*it).begin(); vit != (*it).end(); vit++)
        {
            cout << *vit << "  ";
        }
        cout << endl;
    }

}



int main()
{

    test01();

    system("pause");

    return 0;
}

 

posted on 2021-11-25 21:25  keep码  阅读(21)  评论(0编辑  收藏  举报