<?php
function add($a, $b)
{
return $a + $b;
}
function subtract($a, $b)
{
return $a - $b;
}
function multiply($a, $b)
{
return $a * $b;
// Add code here
}
function divide($a, $b)
{
return $a / $b;
}
// Add code to test your functions here
echo add(4, 5);
echo subtract(18, 9);
echo multiply(3, 3);
echo divide(18, 3);
function intersect(&$ray, &$p)
{
$d = $this->distance($ray);
if ($d < $p["distance"]) {
$rayOrigin = $ray["origin"];
$rayDirection = $ray["direction"];
$scaledDirection = scaleBy($rayDirection, $d);
$v = add($rayOrigin, subtract($scaledDirection, $this->center));
$p = newIntersectionPoint($d, normalize($v));
}
return $p;
}
*/
?>
- See more at: http://func5studios.com/blog/php-ajax-calculator-0#sthash.rrLnumZZ.dpuf
<?php
$equate = "";
$calculate = urldecode($_POST['equate']);
$func = $_POST['func'];
if (isset($func)) {
switch ($func) {
case "add":
$response = add($calculate);
return json_encode($response);
break;
case "subtract":
$response = subtract($calculate);
return json_encode($response);
break;
case "multiply":
$response = multiply($calculate);
return json_encode($response);
break;
case "divide":
$response = divide($calculate);
return json_encode($response);
break;
}
}
function add($calculate)
{
$addItems = $calculate;
}
}
function modulus($a, $b)
{
$isValid = validate($a, $b);
if ($b == 0) {
return "Error: We can't modulus by zero.";
}
if ($isValid === true) {
return $a % $b;
} else {
return $isValid;
}
}
function multbyadd($a, $b)
{
$sum = 0;
for ($i = 0; $i < $b; $i++) {
$sum = $sum + $a;
}
return $sum;
// above works. or i=1; i<=b.
}
echo add("a", 7) . PHP_EOL;
echo subtract("a", 7) . PHP_EOL;
echo multiply("a", 7) . PHP_EOL;
echo multiply(2, 7) . PHP_EOL;
echo divide(2, 0) . PHP_EOL;
echo divide(2, 7) . PHP_EOL;
echo modulus(2, 7) . PHP_EOL;
echo multbyadd(2, 7) . PHP_EOL;
{
if ($b == 0) {
return 'ERROR: You are trying to destroy us all! ' . $a . ' ' . $b;
}
// $isValid = errorMessage($a, $b);
if (validate($a, $b)) {
return $a / $b;
}
// } else {
// return $isValid;
// }
}
function modulus($a, $b)
{
if ($b == 0) {
return 'ERROR: You are trying to destroy us all! ' . $a . ' ' . $b;
}
// $isValid = errorMessage($a, $b);
if (validate($a, $b)) {
return $a % $b;
}
// } else {
// return $isValid;
// }
}
echo add(9, "notNumeric") . PHP_EOL;
echo subtract(9, 3) . PHP_EOL;
echo multiply(9, 3) . PHP_EOL;
echo divide(9, 0) . PHP_EOL;
echo modulus(9, 3) . PHP_EOL;
// Add code to test your functions here
{
return $a + $b . PHP_EOL;
}
function subtract($a, $b, $order = true)
{
return ($order ? $a - $b : $b - $a) . PHP_EOL;
}
function multiply($a, $b)
{
return $a * $b . PHP_EOL;
}
function divide($a, $b, $order = true)
{
return ($order ? $a / $b : $b / $a) . PHP_EOL;
}
echo subtract(10, 5, false);
echo add(10, 5);
echo multiply(10, 5);
echo divide(10, 5, false);
?>
</section>
<section id="exercise6">
<h3>Exercise 6</h3>
<p>Create a function which can accept any number of integer arguments and which returns their sum.</p>
<?php
function sum()
{
$sum = 0;
if (func_num_args() > 0) {
<?php
function add($a, $b)
{
return $a + $b;
}
function subtract($a, $b)
{
return $a - $b;
}
function multiply($a, $b)
{
$tot = 0;
for ($i = 0; $i < $a; $i++) {
$tot += $b;
}
return $tot;
}
function divide($a, $b)
{
return $a / $b;
}
echo "add: " . add(6, 4) . PHP_EOL;
echo "sub: " . subtract(12, 2) . PHP_EOL;
echo "mul: " . multiply(5, 2) . PHP_EOL;
echo "div: " . divide(20, 2) . PHP_EOL;
} else {
return displayError($a, $b, 'divide');
}
}
function modulus($a, $b)
{
if (validateNumbers($a, $b)) {
return $a % $b;
} else {
return displayError($a, $b, 'modulus');
}
}
function multiplyForLoop($a, $b)
{
if (validateNumbers($a, $b)) {
$sum = 0;
for ($i = 0; $i < $b; $i++) {
$sum = $sum + $a;
}
return $sum;
} else {
return displayError($a, $b, 'multiply');
}
}
echo add(5, 'awesome') . PHP_EOL;
echo subtract(5, 4) . PHP_EOL;
echo multiply(5, 4) . PHP_EOL;
echo divide(6, 3) . PHP_EOL;
echo modulus(6, 3) . PHP_EOL;
echo multiplyForLoop(1, 'zee') . PHP_EOL;
#multiplying with for loop
$minutes += 60;
$hours -= 1;
}
if ($hours < 0) {
$hours += 24;
$days -= 1;
}
if ($days < 0) {
$months -= 1;
}
if ($months < 0) {
$months += 12;
$years -= 1;
}
if ($days < 0) {
$date = localtime(mktime(12, 0, 0, $time2[1], 31, $time2[0]));
$days_in_month = 31 - $date[3] ? 31 - $date[3] : 31;
$days += $days_in_month;
}
return array($years, $months, $days, $hours, $minutes, $seconds);
}
putenv("TZ=EST5EDT");
$bdays = array(array(103, 11, 11, 8, 24, 30), array(106, 1, 7, 19, 10, 30));
$ages = array();
foreach ($bdays as $i => $bday) {
$now = array_reverse(array_slice(gmtime(), 0, 6));
$ages[$i] = subtract($bday, $now);
}
?>
return $a % $b;
} else {
throwErrorMessage($a, $b, true);
}
}
function throwErrorMessage($a, $b, $zero = false)
{
if ($zero) {
echo "{$a} and {$b} must be numeric and the second number can not be 0.\n";
} else {
echo "{$a} and {$b} must be numeric.\n";
}
}
// Add code to test your functions here
$a = 10;
$b = 5;
echo "Addition: ";
echo add($a, $b);
echo PHP_EOL;
echo "Subtraction: ";
echo subtract($a, $b);
echo PHP_EOL;
echo "Multiplication: ";
echo multiply($a, $b);
echo PHP_EOL;
echo "Division: ";
echo divide($a, $b);
echo PHP_EOL;
echo "Modulus: ";
echo modulus($a, $b);
echo PHP_EOL;
<?php
/*this example uses functions to simplify complex calculations*/
function add($x, $y)
{
$z = $x + $y;
return $z;
}
function subtract($x, $y)
{
$z = $x - $y;
return $z;
}
function multiply($x, $y)
{
$z = $x * $y;
return $z;
}
echo "(2 + 4) x (10 - 5) = " . multiply(add(2, 4), subtract(10, 5));
//Output: (2 + 4) x (10 - 5) = 30
* Date: 12/11/15
* Time: 7:39 PM
*/
function calc($val, $val2)
{
echo $val + $val2;
}
function subtract($val, $val2)
{
echo $val - $val2;
}
function returnArray()
{
return 2;
}
$var = subtract(1, 2);
$var2 = returnArray() + 3;
for ($i = 0; $i < $var2; $i++) {
echo $i;
}
class Calc
{
public $val = "";
public $val2 = "";
public function add()
{
echo $this->val + $this->val2;
}
public function subtract()
{
echo $this->val - $this->val2;
return $a * $b;
// for ($i = 1; $i < $b; $i++) {
// $y = add($a, $a);
// return $y;
// // return add($a, $a);
// }
}
function divide($a, $b)
{
if (isnumeric($a, $b) && $b != 0) {
return $a / $b;
} elseif (isnumeric($a, $b) == true && $b == 0) {
return "You can't divide by zero\n";
} else {
return "Numbers please\n";
}
}
function modulus($a, $b)
{
if (isnumeric($a, $b)) {
return $a % $b;
} else {
return "Numbers please\n";
}
}
// Add code to test your functions here
echo add(20, 5) . PHP_EOL;
echo subtract(20, 5) . PHP_EOL;
echo multiply(20, 5) . PHP_EOL;
echo divide(20, 5) . PHP_EOL;
echo modulus(20, 5) . PHP_EOL;
}
function divide($a, $b)
{
if ($b == 0) {
return "Error: You cannot divide by 0\n";
} elseif (is_numeric($a) && is_numeric($b)) {
return $a / $b;
} else {
return errorMessage($a, $b);
}
}
function modulus($a, $b)
{
if (b == 0) {
return "Error: You cannot divide by 0\n";
} elseif (is_numeric($a) && is_numeric($b)) {
return $a % $b;
} else {
return errorMessage($a, $b);
}
}
function errorMessage($a, $b)
{
return 'ERROR: Please input only numbers for $a is ' . $a . ' and $b is ' . $b . PHP_EOL;
}
// Add code to test your functions here
echo add($a, $b) . PHP_EOL;
echo subtract($a, $b) . PHP_EOL;
echo multiply($a, $b) . PHP_EOL;
echo divide($a, 0) . PHP_EOL;
echo modulus($a, $b) . PHP_EOL;
//--Math System
$question = $query[1];
$answer = 0;
/*
Using this regex we can split the string into an array based on the 4 math operators (+,-,/,*).
PREG_SPLIT_DELIM_CAPTURE returns the operators as part of the array.
*/
$stack = preg_split('/ *([+\\-\\/*]) */', $question, -1, PREG_SPLIT_DELIM_CAPTURE);
//The stack array must have a minimum of 3 elements to form a valid math operation: [A] [OPERATOR] [B]
while (sizeof($stack) >= 3) {
switch ($stack[1]) {
case "+":
$answer = addition($stack[0], $stack[2]);
break;
case "-":
$answer = subtract($stack[0], $stack[2]);
break;
case "*":
$answer = multiply($stack[0], $stack[2]);
break;
case "/":
$answer = divide($stack[0], $stack[2]);
break;
}
//Remove the first 3 elements from the stack as they have been processed
$stack = array_slice($stack, 3);
//Add the current answer total to the beginning of the array for any further processes
array_unshift($stack, $answer);
}
function addition($val1, $val2)
{
} else {
echo "ERROR: Cannot divide by 0\n";
}
}
}
function modulus($a, $b)
{
$error = errorCheck($a, $b);
if ($error) {
if ($a != 0 && $b != 0) {
return $a % $b;
} else {
echo "ERROR: Cannot divide by 0\n";
}
}
}
function errorCheck($a, $b)
{
if (!is_numeric($a) || !is_numeric($b)) {
echo "ERROR: Both arguments must be numbers\n";
return false;
} else {
return true;
}
}
// Add code to test your functions here
echo add(10, 2) . PHP_EOL;
echo subtract(10, 2) . PHP_EOL;
echo multiply(10, 2) . PHP_EOL;
echo divide(10, 2) . PHP_EOL;
echo modulus(10, 2) . PHP_EOL;
case 'non numeric':
echo "Error! Values given must be numeric! You gave {$a} and {$b}." . PHP_EOL;
break;
case 'divide by zero':
echo "Error! You can't divide by zero! You gave {$a} and {$b}" . PHP_EOL;
break;
case 'multiply by zero':
echo "Error! When you multiply by zero, it is equal to zero" . PHP_EOL;
break;
default:
echo "Error not found" . PHP_EOL;
break;
}
die;
}
function validateNumber($a, $b)
{
if (is_numeric($a) && is_numeric($b)) {
return true;
}
return false;
}
function validateZero($b)
{
return $b == 0;
}
echo add(8, 5) . PHP_EOL;
echo subtract(8, 5) . PHP_EOL;
echo multiply(8, 0) . PHP_EOL;
echo divide(8, 0) . PHP_EOL;
echo modulus(8, 5) . PHP_EOL;
