“C - C++” joke about postfix/prefix operation ordering

Question

My friend sent me a joke:

Q. What\'s the difference between C and C++?

A. Nothing, because: (C - C++ == 0)

I tried to change

Answer 1

Because the increment is performed before the operation in one case, whereas the increment is performed after the operation in the other case.

int c = 10;
System.out.println(c); // output 10
System.out.println(c++); // outputs 10
System.out.println(c); // output 11
System.out.println(++c); // output 12
System.out.println(c); // output 12