Passing array to a function (and why it does not work in C++)

Question

I have come across some C code that compiles, but I do not understand why. Specifically, I have a C library that has a lot of code using this format:

void ge         


        

Answer 1

All that it does (in C) is allow you to write indexing code in the called funcion without having to do the address calculation yourself, for example:

double d= xu_col[i*row_size + j]; //get element [i,j]

versus

double d= xu_col[i][j];