Remove x number of decimals form a float

Hello,

I am trying to implement a 100% math function ( avoid handle
the float as 
a char array), that remove x number of decimals from the
right to the 
float point.

Example:
Given x= 12345.6789 I call the function with (x,2) and the
returned number 
is: x= 12345.67, for (x,4) returned value is x=12345

I was trying to implement this function using datatype
casting, abs() and 
other functions from math.h library.

Thanks for any advice,


---
Fabio Andres Miranda
Ingenieria de sistemas informaticos
Universidad Latina - Costa Rica

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