C++ program to find the maximum and minimum of two numbers using cmath :

cmath header provides two functions fmax and fmin to find out the maximum and minimum of two numbers. We can use one if-else block or simply use any one of these functions to find out the max or min between two.

In this blog post, I will show you how to use fmax and fmin functions with examples.

fmax() Definition :

fmax() is defined as below :

double fmax(double x, double y)
float fmax(float x, float y)
long double fmax(long double x, long double y)

Here, x and y are the numbers to compare. It returns the larger number. If you pass NaN to any one of these parameters, it will return the other number.

fmin() Definition :

fmin() is similar to fmax(). The only difference is that it will return the smaller argument. This method is defined as below :

double fmin(double x, double y)
float fmin(float x, float y)
long double fmin(long double x, long double y)

Similar to fmax, if we pass NaN to any one of these parameters, it will return the other.

Example of fmin() and fmax() :

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
	double first;
	double second;

	cout << "Enter the first number : " << endl; cin >> first;

	cout << "Enter the second number : " << endl; cin >> second;
	
	cout << "Maximum : " << fmax(first, second) << endl;
	cout << "Minimum : " << fmin(first, second) << endl;

	return 0;
}

Sample Output :

Enter the first number : 
12.33
Enter the second number : 
-10.4
Maximum : 12.33
Minimum : -10.4

Enter the first number : 
12
Enter the second number : 
3
Maximum : 12
Minimum : 3

Here, we are taking the numbers as input from the user. Note that you need to import cmath module to use these methods.