.net php比较大小

using System;

class Program
{
    static void Main()
    {
        int a = 10;
        int b = 20;

        if (a < b)
        {
            Console.WriteLine("a is less than b");
        }
        else if (a > b)
        {
            Console.WriteLine("a is greater than b");
        }
        else
        {
            Console.WriteLine("a is equal to b");
        }

        int min = Math.Min(a, b);
        int max = Math.Max(a, b);

        Console.WriteLine($"Min: {min}, Max: {max}");
    }
}

<?php
$a = 10;
$b = 20;

if ($a < $b) {
    echo "a is less than b";
} elseif ($a > $b) {
    echo "a is greater than b";
} else {
    echo "a is equal to b";
}

$min = min($a, $b);
$max = max($a, $b);

echo "\nMin: $min, Max: $max";
?>

double x = 0.1 + 0.2;
double y = 0.3;

if (Math.Round(x, 7) == Math.Round(y, 7))
{
    Console.WriteLine("x is equal to y");
}
else
{
    Console.WriteLine("x is not equal to y");
}

<?php
$x = 0.1 + 0.2;
$y = 0.3;

if (bccomp($x, $y, 7) == 0) {
    echo "x is equal to y";
} else {
    echo "x is not equal to y";
}
?>