The code in the examples is not valid in any historical version of C. The use of the -> operator with an implicit int as the left argument ("entry" in the examp

The code in the examples is not valid in any historical version of C. The use of the -> operator with an implicit int as the left argument ("entry" in the examples) was only valid from 1975 in Unix C (but not in GCOS C) until K&R C in 1978. The use of C++ style comments ("//") is only valid in standard C since 1999. There's no point in arguing over pseudocode as if it's C.