iPhone计算器十进制数字在输入时反转

While doing tutorial work, it took me forever to implement a decimal point, and now i have one, that works in the formula, but the issue is it reverses the input - e.g.. enter 1.4, the calculator screen shows it as 4.1 - i know its something to do with my housekeeping of the variables.. planning to use BOOL's instead of a float..but..any takers?While doing tutorial work, it took me forever t