How to use min function in c++

min function is used to compare the minimum of two or more values. It takes arguments a and b and returns the smallest of them. If you use comparator comp, you can customize the comparison rules. The min function can also be used to compare multiple values ​​by passing them as function arguments.

Usage of min function in c

Introduction to min function

## The #min function is a standard library function used to compare the minimum of two or more values. It accepts two or more parameters and returns the smallest value among them.

Function Syntax

<code class="cpp">#include <algorithm>

template<class T>
const T& min(const T& a, const T& b);

template<class T, class Compare>
const T& min(const T& a, const T& b, Compare comp);</code>

Parameters

• a and b : Two or more values ​​to compare.
• comp: Optional comparator for custom comparison rules (only the second function prototype exists).

Return type

#min The function return type is the same as the parameter type, representing the minimum value.

Usage example

Compare the minimum value of two numbers:

<code class="cpp">int a = 10;
int b = 5;

int min_value = min(a, b); // min_value 为 5</code>

Use a comparator to customize the comparison rule:

<code class="cpp">struct MyComparator {
    bool operator()(const int& a, const int& b) {
        return a > b;
    }
};

int a = 10;
int b = 5;

int max_value = min(a, b, MyComparator()); // max_value 为 10</code>

Note:

If two or more values ​​are equal, the
• min function will return the first parameter.
• min Functions can also be used to compare multiple values ​​by passing them as function arguments.

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