Question

public function add($temp) {
        $newNum = $this->num + $temp->num;
        if($this->denum == $temp->denum) {
               // add two fractions having same denominator
               $answer = $newNum . "/" . $this->denum;
        } else {
               // how to add two fractions having different denominator?
        }
        return $answer;
}

换句话说，如何处理具有不同分母的两个分数的情况，如：

1/3 + 1/6 = 3/6

或

1/3 + 1/5 = 8/15

Answer 1

function gcd($num1, $num2) {
 /* finds the greatest common factor between two numbers */
    if ($num1 < $num2) {
        $t = $num1;
        $num1 = $num2;
        $num2 = $t;
    }
    while ($t = ($num1 % $num2) != 0) {
        $num1 = $num2;
        $num2 = $t;
    }
    return $num2;
}

public function add($temp) {
    $newNum = $this->num * $temp->denum + $temp->num * $this->denum;
    $newDenum = $temp->denum * $this->denum;
    $gcd = gcd($newNum, $newDenum);
    $newNum /= $gcd;
    $newDenum /= $gcd;
    return $newNum . '/' . $newDenum;
}

Answer 2

假设您要添加1/3到1/6，只需执行

$result = 1/3 + 1/6;

Answer 3

这不会减少你的分数，但除此之外它应该做你想要的：

public function add($temp) {
    if($this->denum == $temp->denum) {
        $newNum = $this->num + $temp->num;
        $answer = $newNum . "/" . $this->denum;
    } else {
        $newNum = $this->num * $temp->denum + $temp->num * $this->denum;
        $answer = $newNum . "/" . $this->denum*$temp->denum;
    }
    return $answer;
}

如何添加分数并将结果显示为分数？

3 个答案: