Copy and Reference Puzzlers - Book 3: 128 FUN Puzzles

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?

Book 2 now has `std::swap` puzzles!

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): __ __ __ __ __