Matrix indexing question for code generation

Suppose you have the following 4x4 Matrix

M= [10 15 20 21;...
    11 18 27 99;...
    13 45 16 10;...
    19 21 31 51;]

It is true that when you do the following call

M(6)

The result is going to be 18 because MATLAB element numbers are counted in columns isn't it?

My question is if this is going to have impact when generating C code as in C for matrix indexing you have to specify the number of raw and column to call an element.

Thanks a lot

[Adam]

I imagine it should work fine. Matrices are not really a concept in C (without libraries) are they? Everything is stored as a linear set of values anyway, under the hood, as far as I am aware.