[系统运维]C++的STL容器中sort()函数的使用方法

#include<iostream>

#include<algorithm>//sort()函数所需头文件 

using namespace std;

int main()

{

	int a[10] = { 4,5,9,3,8,2,1,4,0,3 };//初始化数组 

	for (int i = 0; i < 10; i++)

		cout << a[i];
	cout << endl;

	sort(a, a + 10);//没有第三个参数，系统默认从小到大排序 

	for (int i = 0; i < 10; i++)

	{
		cout << a[i] << " ";
	}
	return 0;

}

输出：

#include<iostream>

#include<algorithm>//sort()函数所需头文件 

using namespace std;

int main()

{

	int a[10] = { 4,5,9,3,8,2,1,4,0,3 };//初始化数组 
	cout << "数组原顺序：" << endl;
	for (int i = 0; i < 10; i++)
		cout << a[i] << " ";
	cout << endl;
	sort(a, a + 10);
	cout << "STL中sort();默认从小到大:" << endl;
	for (int i = 0; i < 10; i++)
		cout << a[i] << " ";
	cout << endl;
	//greater<int>()尖括号里面加数据类型排序
	sort(a, a + 10,greater<int>());
	cout<<"使用greater<int>()从大到小:" << endl;
	for (int i = 0; i < 10; i++)
		cout << a[i] << " ";
	cout << endl;

	sort(a, a + 10, less<int>());
	cout<<"使用less<int>()从小到大：" << endl;
	for (int i = 0; i < 10; i++)
		cout << a[i] << " ";
	cout << endl;
	return 0;

}

输出：

?用另一种数据类型char实现

#include<iostream>

#include<algorithm>//sort()函数所需头文件 

using namespace std;

int main()

{

	char a[4];
	cout << "请输入字符" << endl;
	for (int i = 0; i < 4; i++)
	{
		cin >> a[i];
	}
	cout << "数组原顺序：" << endl;
	for (int i = 0; i < 4; i++)
		cout << a[i] << " ";
	cout << endl;
	sort(a, a + 4);
	cout << "STL中sort();默认从小到大:" << endl;
	for (int i = 0; i < 4; i++)
		cout << a[i] << " ";
	cout << endl;
	//greater<int>()尖括号里面加数据类型排序
	sort(a, a + 4,greater<char>());
	cout<<"使用greater<int>()从大到小:" << endl;
	for (int i = 0; i < 4; i++)
		cout << a[i] << " ";
	cout << endl;

	sort(a, a + 4, less<char>());
	cout<<"使用less<int>()从小到大：" << endl;
	for (int i = 0; i < 4; i++)
		cout << a[i] << " ";
	cout << endl;
	return 0;

}

输出结果：

?