C++ STL 中的 std::minmax() 和 std::minmax_element()

2024 年 8 月 28 日 | 3 分钟阅读

我们已经知道，C++ 编程语言拥有一个如海洋般浩瀚的标准模板库（Standard Template Library），其中包含了许多预定义的功能。为了找出由用户输入或由测试/开发人员预定义的数组元素中的最大值或最小值，我们使用标准的最小函数或整个函数。

为了同时获取最大值和最小值，可能会需要一些重复编写或反复使用代码。因此，C++ STL 以 std minmax() 和 minmax_element() 函数的形式为我们提供了解决方案。这两个函数都接受参数，形式可以是任何自然数、整数的变量，也可以是元素数组。

minmax() 函数的 C++ 代码

// Here, we are writing down the C++ programming language to demonstrate 
// the concept of std::minmax() and std::minmax_element() in C++ STL
#include<iostream>
#include<algorithm>
using namespace std;

int main()
{
	
// the below code snippet implements declaring the pair
// which is useful in catching the return value thrown after operations
pair<int, int> mnmx;

// the below code snippet helps us with using min and max functions passed 
// as two parameters
mnmx = minmax(63, 33);
	
// the below code snippet helps us with using min and max functions passed 
// as two parameters and printing them down on our output screens
cout << "minimum value is : ";
cout << mnmx.first;
cout << "\nmaximum value is : ";
cout << mnmx.second ;
	
// the below code snippet helps us with using min and max functions passed 
// as two parameters here, they are being given as the array of elements
mnmx = minmax({12, 15, 11, 16, 13});
	
// the below code snippet helps us with using min and max functions passed 
// as two parameters and printing them down on our output screens
cout << "\nminimum value: ";
cout << mix.first;
cout << "\nmaximum value  : ";
cout << mnmx.second;
	
}

输出

/ tmp / 1Lj mBg VyK h.o
The minimum value is : 33
The maximum value is : 63
minimum value : 11
maximum value  : 16

minmax_element() 函数的 C++ 代码

// Here, we are writing down the C++ programming language to demonstrate 
// the concept of std::minmax() and std::minmax_element() in C++ STL
#include<iostream>
#include<algorithm>
#include<vector>
using namespace std;

int main()
{
	
	// the below code snippet helps us with vectors being passed as the 
	// data type integer and values ranging from only single integers
	vector<int> vi = { 15, 13, 14, 14, 13, 15, 13 };
		
		
	// the below code snippet helps us with declaring the pointer variable
	// of integer data type where one vector being iterator other is a maxx
	// these pointer variables return us a value which will then be caught
	pair<vector<int>::iterator, vector<int>::iterator> mnmx;
		
	// using minmax_element() to find
	// minimum and maximum element
	// between 0th and 3rd number
	mnmx = minmax_element(vi.begin(), vi.begin() + 14);
		

	// the below code snippet helps us with using min and max functions 
	//passed 
   // as two parameters and printing their positions down on our output 
   //screens
	cout << "position of the minimum value obtained after operating is : ";
	cout << mnmx.first - vi.begin() << endl;
		
	cout << "position of the maximum value obtained after operating is : ";
	cout << mnmx.second - vi.begin() << endl;
		
	cout << endl;
		

	
	// here, we are using the duplicates
	// the below code snippet prints us 11 and 15 respectively as outputs
	
	mnmx = minmax_element(vi.begin(), vi.end());
		
	// the below code snippet helps us with using min and max functions 
	//passed 
   // as two parameters and printing them down on our output screens

	cout << "position of the minimum value obtained after operating is : ";
	cout << mnmx.first - vi.begin() << endl;
		
	cout << "position of the maximum value obtained after operating is : ";
	cout << mnmx.second - vi.begin()<< endl;
	
	
	
}

输出

/ tmp /1 LjmB gVy Kh.o
position of the minimum value obtained after operating is : 7
position of the maximum value received after working is : 10

position of the minimum value obtained after operating is : 1
position of the maximum value received after working is : 5

下一主题C++ STL 中的 multimap::emplace_hint() 函数

C++ STL 中的 std::minmax() 和 std::minmax_element()

minmax() 函数的 C++ 代码

minmax_element() 函数的 C++ 代码

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C++ STL 中的 std::minmax() 和 std::minmax_element()

minmax() 函数的 C++ 代码

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