What operations are valid on pointers? When does one get the Illegal use of pointer in function error?
This is what is Valid
px<py
px>=py
px==py
px!=py
px==NULL
px=px+n
px=px-n
px-py
Everything else is invalid (multiplication, division, addition of two pointers)!
Something like
j = j * 2;
k = k / 2;
where j and k are pointers will give this error
Illegal use of pointer in function main
