#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; }