Question

What does this kind of declaration mean in c++?

CSomething & SOMETHING = m_vSOMETHING[m_iSOMETHING];

Answer 1

It is a reference variable which is initialized to point to the specified cell in m_vSOMETHING

So a declaration of

int &reftotable = table[42];

Will produce reftotable as a variable which reference cell 42 in the table, similar to what

int *pointertocell = &table[42];

would do. In the first case with the reference you can assign reftotable like it was a normal variable

reftotable = 37;

where in the other case you will have to do

*pointertocell = 37;

to do the same thing — that is, in both cases table[42] will contain the value 37 after the assignment.