boost::algorithm::clamp() in C++ library

The clamp() function in C++ boost library is found under the header ‘boost/algorithm/clamp.hpp’ contains two functions for “clamping” a value between a pair of boundary values.

Syntax:

const T& clamp ( const T& val, const T& lo, const T& hi )
or 
const T& clamp ( const T& value, const T& low, const T& high, Pred p )

Parameters: The function accepts parameters as described below:

value: This speifies the value compared to.
low: This specifies the lower range.

high: This specifies the higher range.
p: This specifies the predicate function.

Return Value: The function returns three values as described below:

It returns low if value is less than low.
It returns high if high is greater than value.
In all other cases, it returns value.

Program-1:

// C++ program to implement the 
// above mentioned function 
  
#include <bits/stdc++.h> 
#include <boost/algorithm/clamp.hpp> 
using namespace std; 
  
// Drivers code 
int main() 
{ 
  
    int value = 5; 
    int low = 10, high = 20; 
  
    // Function used 
    int ans 
        = boost::algorithm::clamp(value, low, high); 
  
    cout << ans; 
    return 0; 
} 

Output:

Program-2:

// C++ program to implement the 
// above mentioned function 
  
#include <bits/stdc++.h> 
#include <boost/algorithm/clamp.hpp> 
using namespace std; 
  
// Drivers code 
int main() 
{ 
  
    int value = 25; 
    int low = 10, high = 20; 
  
    // Function used 
    int ans 
        = boost::algorithm::clamp(value, low, high); 
    cout << ans; 
    return 0; 
} 

Output:

Program-3:

// C++ program to implement the 
// above mentioned function 
  
#include <bits/stdc++.h> 
#include <boost/algorithm/clamp.hpp> 
using namespace std; 
  
// Drivers code 
int main() 
{ 
  
    int value = 15; 
    int low = 10, high = 20; 
  
    // Function used 
    int ans 
        = boost::algorithm::clamp(value, low, high); 
    cout << ans; 
    return 0; 
} 

Output:

Reference: https://www.boost.org/doc/libs/1_70_0/libs/algorithm/doc/html/the_boost_algorithm_library/CXX14/mismatch.html

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