how to store two decimal point number in array

I have some data like 0.23456789 and i want to store it in array like 0.23..Can anyone tell how to store in array?

Answer 1

[per isakson]

    val = round( 100*val ) /100;

and see Why is 0.3 - 0.2 - 0.1 (or similar) not equal to zero?