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Exercise · Variables and Types · lesson 9 of 9

Exercise: call counter

Write the function int next_id(): each call returns the next number in order, starting from 1.

  • first call next_id() → 1
  • second call next_id() → 2
  • third call next_id() → 3

Constraints: the checks call next_id() four times in a row, and the program makes no other calls.

Do not add extra #include lines unless the task says so explicitly.

next_id.cpp — cpp
cpp · 4 lines
Ctrl+Enter run · Esc leave editor

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