UNSW ProgComp: Problem 2 - 2005

<?php

$input = <<<END
67.5 150
64 160.0
74.00000000 200
100 205
END;

//Weight in kilograms - Height in centimeters

$input = explode("\n", $input);

foreach($input as $key => $value){
    $line = explode(" ", $value);
    $weight = $line[0];
    $height = $line[1];

    $height_m = intval($height)/100;

    if($height != 0){
        $bmi = round($weight/pow($height_m, 2), 1);
    }

    if($bmi > 30){
        $weight_status = "Obese";
    }elseif($bmi > 25){
        $weight_status = "Overweight";
    }elseif($bmi >= 18.5){
        $weight_status = "Normal";
    }else{
        $weight_status = "Underweight";
    }

    $out_weight = str_pad(number_format(round($weight, 1), 1)."kg", 8, " ", STR_PAD_RIGHT);
    $out_height = str_pad(round($height)."cm", 7, " ", STR_PAD_RIGHT);
    $out_bmi = str_pad("BMI=".number_format(round($bmi, 1), 1), 10, " ", STR_PAD_RIGHT);

    if(count($input)-1 != $key){
        //add newline to end of print
        print $out_weight.$out_height.$out_bmi.$weight_status."\n";
    }else{
        //print without appended new line
        print $out_weight.$out_height.$out_bmi.$weight_status;
    }
}