OOP Learning Mode
Qusetions Index 166/246
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Consider the following segment of PHP code. When it is executed, the string returned by the $eight_tenths->to_string method is 8 / 10 instead of the expected 4 / 5. Why?
class fraction {
var $numerator;
var $denominator;
function __construct($n, $d) {
$this->set_numerator($n);
$this->set_denominator($d);
}
function set_numerator($num) {
$this->numerator = (int)$num;
}
function set_denominator($num) {
$this->denominator = (int)$num;
}
function to_string() {
return "{$this->numerator} / {$this->denominator}";
}
}
function gcd($a, $b) {
return ($b > 0) ? gcd($b, $a % $b) : $a;
}
function reduce_fraction(&$fraction) {
$gcd = gcd($fraction->numerator,$fraction->denominator);
$fraction->numerator /= $gcd;
$fraction->denominator /= $gcd;
}
$eight_tenths = new fraction(8,10);
/* Reduce the fraction */
reduce_fraction($eight_tenths);
var_dump($eight_tenths->to_string()); |
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