make the meaning of /* for dereference and dividing not for commenting by adding some special character

Question

I have a code like this:

int quotient = 100/*ptr; 

where ptr is a pointer to interger.

But it's taking /* as the comment.
How can I make the meaning of divide by pointer dereference value? What extra special character I have to put to have this meaning?

Answer 1

This happens because language tried to reuse the tokens. (* in this case)

Solution is to put a space between / and * to beat maximal munch.

int quotient = 100 / *ptr;

Another way is to add a parenthesis or use another local variable:

int quotient = 100/(*ptr);

Answer 2

First, you can replace *ptr with ptr[0], as both have the same semantics:

int quotient = 100/ptr[0];

And since array indexing is commutative, you can swap the operands:

int quotient = 100/0[ptr];

To the casual reader, this may look like division by zero, but of course [] has higher precedence than /. You may want to put a space there, just in case:

int quotient = 100/0 [ptr];

Congratulations, you now have a job for life!