C++基础知识：C++容器类vector实践

#include <iostream>//vector类是C++中最常用的容器类#include <vector>using namespace std;int main(){//初始化vectorvector<int> vecTest;for(int i=0;i<10;i++)//push_back()方法在vector的末尾附加元素vecTest.push_back(i);vector<int>::iterator it = vecTest.begin();//it是地址while(it<vecTest.end()){cout<<*it<<endl;it++;}//找到插入的位置vector<int>::iterator insertPosition = vecTest.begin()+3;int arr[] = {11,12,13};//向vector中插入元素vecTest.insert(insertPosition,arr,arr+3);//输出容器中的元素个数cout << "size: " << (int) vecTest.size() << "/n";cout << "capacity: " << (int) vecTest.capacity() << "/n";//最多可以放多少个元素cout << "max_size: " << (int) vecTest.max_size() << "/n";//erase方法移除元素vector<int>::iterator removeIt = vecTest.begin();//移除前三个元素vecTest.erase(removeIt,removeIt+2);//size()方法返回容器中的元素个数while(vecTest.size()>0){//使用back()方法取到最后一个值cout<<"pop "<<vecTest.back()<<endl;//使用pop_back()方法移除掉最后一个元素vecTest.pop_back();//输出容器中的元素实际个数，cout << "size: " << (int) vecTest.size() << "/n";//在pop_back()执行之后capacity的值并没有变cout << "capacity: " << (int) vecTest.capacity() << "/n";//最多可以放多少个元素cout << "max_size: " << (int) vecTest.max_size() << "/n";}int j;cin>>j;return 0;}