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

Last Updated : 25 Aug, 2021

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

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

Return Value

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

CPP

// 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

CPP

// 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

CPP

// 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;
}