[C++STL]deque容器用法介绍

Posted 2021-06-27 Wecccccccc

代码如下：

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


void printDeque(const deque<int>& d)
{
	for (deque<int>::const_iterator it = d.begin(); it != d.end(); it++)
	{
		cout << *it << " ";
	}
	cout << endl;
}

void test01()
{
	deque<int>d1;
	for (int i = 0; i < 10; i++)
	{
		d1.push_back(i);
	}

	printDeque(d1);

	deque<int>d2(d1.begin(), d1.end());
	printDeque(d2);

	deque<int>d3(10, 100);
	printDeque(d3);

	deque<int>d4 = d3;
	printDeque(d4);
}

	
int main()
{
	test01();
	return 0;
}

测试结果：

总结：
deque容器和vector容器的构造方式几乎一致，灵活使用即可。

代码如下:

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


void printDeque(const deque<int>& d)
{
	for (deque<int>::const_iterator it = d.begin(); it != d.end(); it++)
	{
		cout << *it << " ";
	}
	cout << endl;
}

void test01()
{
	deque<int>d1;
	for (int i = 0; i < 10; i++)
	{
		d1.push_back(i);
	}
	printDeque(d1);

	deque<int>d2;

	d2 = d1;
	printDeque(d2);

	deque<int>d3;
	d3.assign(d1.begin(), d1.end());
	printDeque(d3);

	deque<int>d4;
	d4.assign(10, 100);
	printDeque(d4);
}

	
int main()
{
	test01();
	return 0;
}

测试结果：

代码如下:

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


void printDeque(const deque<int>& d)
{
	for (deque<int>::const_iterator it = d.begin(); it != d.end(); it++)
	{
		cout << *it << " ";
	}
	cout << endl;
}

void test01()
{
	deque<int>d1;
	for (int i = 0; i < 10; i++)
	{
		d1.push_back(i);
	}
	printDeque(d1);

	if (d1.empty())
	{
		cout << "d1 empty" << endl;
	}
	else
	{
		cout << "d1 no empty" << endl;
		cout << "d1 size = " << d1.size() << endl;
	}

	d1.resize(15, 1);
	printDeque(d1);

	d1.resize(5);
	printDeque(d1);

}

	
int main()
{
	test01();
	return 0;
}

测试结果：

总结：

代码如下：

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


void printDeque(const deque<int>& d)
{
	for (deque<int>::const_iterator it = d.begin(); it != d.end(); it++)
	{
		cout << *it << " ";
	}
	cout << endl;
}

void test01()
{
	deque<int>d;
	d.push_back(10);
	d.push_back(20);

	d.push_front(100);
	d.push_front(200);

	printDeque(d);

	d.pop_back();

	d.pop_front();

	printDeque(d);
}


void test02()
{
	deque<int>d;
	d.push_back(10);
	d.push_back(20);
	d.push_front(100);
	d.push_front(200);
	printDeque(d);

	d.insert(d.begin(), 1000);
	printDeque(d);

	d.insert(d.begin(), 2, 10000);
	printDeque(d);

	deque<int>d2;
	d2.push_back(1);
	d2.push_back(2);
	d2.push_back(3);

	d.insert(d.begin(), d2.begin(), d2.end());
	printDeque(d);
}

	
int main()
{
	test01();
	test02();
	return 0;
}

测试结果：

总结:

代码如下：

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


void printDeque(const deque<int>& d)
{
	for (deque<int>::const_iterator it = d.begin(); it != d.end(); it++)
	{
		cout << *it << " ";
	}
	cout << endl;
}

void test01()
{
	deque<int>d;
	d.push_back(10);
	d.push_back(20);
	d.push_front(100);
	d.push_front(200);

	for (int i = 0; i < d.size(); i++)
	{
		cout << d[i] << " ";
	}
	cout << endl;

	for (int i = 0; i < d.size(); i++)
	{
		cout << d.at(i) << " ";
	}
	cout << endl;

	cout << "front = " << d.front() << endl;
	cout << "back =  " << d.back() << endl;
}




	
int main()
{
	test01();
	return 0;
}

测试结果:

总结:

代码如下：

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


void printDeque(const deque<int>& d)
{
	for (deque<int>::const_iterator it = d.begin(); it != d.end(); it++)
	{
		cout << *it << " ";
	}
	cout << endl;
}

void test01()
{
	deque<int>d;
	d.push_back(10);
	d.push_back(20);
	d.push_front(100);
	d.push_front(200);

	printDeque(d);
	sort(d.begin(), d.end());
	printDeque(d);
}




	
int main()
{
	test01();
	return 0;
}

测试结果：

总结: