Question

I want to develop game that generates random simple math equations.

• easy – 4+5, 5-6 (operator used are +,-)
• medium – 4*5, 5/6 (operator used are +,-,*,/)
• difficult – 4*5/7, 5/6-5 (operator used are +,-,*,/)

Now I think this can be done simply generating every character randome, i.e. generate two random numbers and then generate a random operator and using them together and keeping conditions to find answer which will also check answer entered by user.

But that would be too rookie to code I guess. I want to know if this is the right way or if I should use any pre-defined math library available for PHP. As of now I have to just work with 4 operators but in future it is possible that I need to implement more complex equations.

Also, I have to implement multiplayer mode and I am thinking to use Comet so that users can play at same time together.
Should I be using PHP and MySQL to create this game or shall I create this using AJAX/JQuery?

Answer 1

Make a array of operators, and generate the operands random;

$operarors = array( '+', '-', '*' );
$operator = $operarors[rand(0,2)];
$leftop = rand(0,10);
$rightop = $rand(0,10);

echo "the math: $leftop $operator $rightop = ??";