C++ 提高教程 STL vector容器-数据存取

Posted 2021-10-31 行码阁119

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

void printVector(vector<int>& v)
{
	for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
	{
		cout << *it << " ";
	}
	cout << endl;
}
void test01()
{
	vector<int>v1;
	for(int i =0;i<9;i++)
	{
		v1.push_back(i);
	}
	printVector(v1);
	//[]
	for (int i = 0; i < 9; i++)
	{
		cout<<v1[i]<<" ";
	}
	cout << endl;

	//利用at方式访问
	for (int i = 0; i < 9; i++)
	{
		cout << v1.at(i)<< " ";
	}
	cout << endl;

	//获取第一个元素
	cout << "第一个元素 " << v1.front() << endl;

	//获取最后一个元素
	cout << "最后一个元素 " << v1.back() << endl;

}
int main()
{
	test01();
	system("pause");
	return 0;
}