Copy and Reference Puzzlers Book 1
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Copy and Reference Puzzlers Book 1

128 FUN Puzzles

About the Book

128 FUN Puzzles of Increasing Difficulty Where You Must Ask: Was that a copy, or was it a reference, and who last changed that value?

Example puzzle:

void run() {
  char char_1{'t'};
  char_1 = 'm';
  auto &char_3 = char_1;
  char_1 = 'u';
  char char_5{'o'};
  char_1 = 'c';
  auto &char_7 = char_3;
  char char_8{'l'};
  auto &char_9 = char_1;
  char_8 = 'k';
  auto &char_11 = char_7;
  char char_12{'l'};
  print("{}{}{}{}{}", char_1, char_12, char_5, char_7, char_8);
Answer (5): __ __ __ __ __

What is printed?

About the Author

Jason Turner
Jason Turner

Jason is host of C++Weekly, Co-host of CppCast, Co-creator and maintainer of the embedded scripting language for C++, ChaiScript, and author and curator of the forkable coding standards

Jason Turner

Episode 186

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