What type for iterator of for-loops?

Hi,

I'm not well-versed in C++, so I need some help in programming in 
Splines.cxx in chart2.

There are already
     typedef ::std::pair< double, double >   tPointType;
     typedef ::std::vector< tPointType >     tPointVecType;
     typedef tPointVecType::size_type        lcl_tSizeType;

My data is in
     tPointVecType aPointsIn;
and the last valid index is
     lcl_tSizeType n;

Now I need a lot of for-loops from 0 to n. They iterate over a matrix of 
elements of type double, over an array of elements of type double, and 
over a vector of type tPointVecType, sometimes in the same loop. What is 
the correct type for the iterator? Should it be lcl_tSizeType or 
sal_uInt32? What is the implication of one or the other?

n can be as large as the count of Spreadsheet rows, theoretically, but 
will be smaller than hundred in most cases.

Kind regards
Regina



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