num1 is the first number
";
echo "$this->num2 is the second number
";
}
}
class addCalc extends baseCalc {
function add() {
var $num3 = $num1 + $num2;
echo "$this->num1 plus $this->num2 equals $this->num3
";
}
}
class subCalc extends baseCalc {
function subtract() {
var $num3 = $num1 - $num2;
echo "$this->num1 minus $this->num2 equals $this->num3
";
}
}
class mulCalc extends baseCalc {
function multiply() {
var $num3 = $num1 * $num2;
echo "$this->num1 times $this->num2 equals $this->num3
";
}
}
class divCalc extends baseCalc {
function divide() {
var $num3 = $num1 / $num2;
echo "$this->num1 divided by $this->num2 equals $this->num3
";
}
}
$object1 = new baseCalc();
$object1 -> calculate();
$object2 = new addCalc();
$object2 -> add();
?>