vector向量容器的一些基本操作

代码语言：javascript复制

#include <vector>
#include <iostream>

using namespace std;

void print(vector<int>& v)//打印函数
{
	cout<<"-----------------------------------------------------"<<endl;
	cout<<"empty = "<<v.empty()<<endl;
	cout<<"size = "<<v.size()<<endl;
	cout<<"max_size = "<<v.max_size()<<endl;
	cout<<"capacity = "<<v.capacity()<<endl;
}

void reverse_print(vector<int>& v)//反向遍历vector元素
{
	vector<int>::reverse_iterator ri , riend;
	riend = v.rend();

	for (ri = v.rbegin();ri!=riend;ri  )
	{
		cout<<*ri<<endl;
	}

	
}

int main()
{
	vector<int> v;

	print(v);

	//添加5个元素
	v.push_back(1);
	v.push_back(2);
	v.push_back(3);
	v.push_back(4);
	v.push_back(5);
	print(v);

	// 再添加4个元素
	v.push_back(6);
	v.push_back(7);
	v.push_back(8);
	v.push_back(9);
	print(v);

	//调整vector数据空间大小
	v.reserve(40);
	print(v);

	reverse_print(v);

	getchar();
	return 0;

}

vector

0 人点赞