[c-prog] Round Upto function.

[Niranjan Kulkarni]

Hi Everyone, 

I am witting a function in C++ for any given number to round upto the
iRoundTo. 
Here is the function I have written: 

void RoundUpTo(float& Num, int iRoundUpTo)
{
 int iRem = 0;

 int iNum = ceil(Num); //Taking another variable since Num float variable
errors out in mod operation below.

 if(iNum == 0) 
  return;

 iRem = iNum % iRoundUpTo;
 int iFactor = iRoundUpTo - iRem; 
 iNum += iFactor;
 Num = (float)iNum; 
}

The expected results is something as follows: 
121.23, 10 ==> 130.00
121.23, 100 ==> 200.00
121.23, 1000 ==> 1000.00
121.23, 50 ==> 150.00
3, 10 ==> 10.00
3, 100 ==> 100.00 
0.00, 10 ==> 0.00
0.00, 100 ==> 0.00

Please do let me know if this makes sense and will be a good code for what I
need to achieve. 

Thanks in advance, 
Niranjan.