Programming Fundamentals/Arrays/PHP
arrays.php
edit<?php
// This program uses arrays to display temperature conversion tables
// and temperature as an array subscript to find a given conversion.
//
// References:
// https://www.mathsisfun.com/temperature-conversion.html
// https://en.wikibooks.org/wiki/PHP_Programming
function build_c($size)
{
$c = array();
for ($index = 0; $index <= $size; $index++)
{
$value = $index * 9 / 5 + 32;
$c[$index] = $value;
}
return $c;
}
function build_f($size)
{
$f = array();
for ($index = 0; $index <= $size; $index++)
{
$value = ($index - 32) * 5 / 9;
$f[$index] = $value;
}
return $f;
}
function display_array($name, $array)
{
for ($index = 0; $index < count($array); $index++)
{
echo($name . "[" . $index . "] = " . $array[$index] ."\n");
}
}
function find_temperature($c, $f)
{
$size = minimum(count($c), count($f));
do
{
echo("Enter a temperature between 1 and " . ($size - 1) . "\n");
$temp = (int)readline();
} while ($temp < 1 or $temp > $size - 1);
echo($temp . "° Celsius is " . $c[$temp] . "° Fahrenheit\n");
echo($temp . "° Fahrenheit is " . $f[$temp] . "° Celsius\n");
}
function minimum($value1, $value2)
{
if($value1 < $value2)
{
$result = $value1;
}
else
{
$result = $value2;
}
return $result;
}
function main()
{
$c = build_c(100);
$f = build_f(212);
display_array("C", $c);
display_array("F", $f);
find_temperature($c, $f);
}
main();
?>
Try It
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