Domanda di colloquio di Apple

class A; function int foo(); int a; return ++a; endfunction endclass program tb; A a; int b, c; initial begin for(int i = 0; i < 10; i++) begin b = a.foo(); c = foo(); $display("B = %0d", b); $display("C = %0d", c); end end function int foo(); int a; return ++a; endfunction