C++ initial value of reference to non-const must be an lvalue

Question

I\'m trying to send value into function using reference pointer but it gave me a completely non-obvious error to me

#include \"stdafx.h\"
#include 

        

Answer 1

The &nKByte creates a temporary value, which cannot be bound to a reference to non-const.

You could change void test(float *&x) to void test(float * const &x) or you could just drop the pointer altogether and use void test(float &x); /*...*/ test(nKByte);.