Also available in print: https://amzn.to/3F724ig

A book of puzzles that should be fun for anyone, but actually educational for people interested in C++.

The solution to every puzzle is a C++ related term or phrase. If you don't know what the solution means, you can search and learn something new.

void run() {
  {
    static S object_1("t", "t");
  }
  S object_2("i", "e");
  static S object_3("m", "_");
}

// Answer (6):// __ __ __ __ __ __

In this puzzle world each object says its first name when its lifetime begins and its last name when the object's lifetime ends. It's just that simple.

The challenge and fun is in keeping track of what order objects' lifetimes begin, and knowing what order they must end in.

Each section has a description of the new concept introduced, and the challenges are increased at a leisurely pace.

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?

This unique puzzle book of 128 FUN puzzles has you following

operations performed in a simulated CPU-like environment.

The puzzles in this book slowly build in complexity as new concepts

are introduced and the size of the puzzle increases.

If you are a programmer, you might get a better feel for how your

computer works. If not, then you'll just have FUN!

void run() {
  Machine<6> machine{{78, 176, 98, 184, 1, 218}};
  mov(machine, 4_address, 1_address);
  dec(machine, 0_address);
  mov(machine, 3_address, 0_address);
  inc(machine, 5_address);
  dec(machine, 1_address);
  inc(machine, 1_address); print(machine);
}

// 16=w 17=v 77=i 98=l 128=i 175=l
// 176=n 219=e 221=k

// Answer (6): __ __ __ __ __ __

A book of puzzles that should be fun for anyone, but actually educational for people interested in C++.

Book 2 now has missing object puzzles!

The solution to every puzzle is a C++ related term or phrase. If you don't know what the solution means, you can search and learn something new.

void run() {  
  {
    static S object_1("t", "t");
  }
  S object_2("i", "e");
  static S object_3("m", "_");
}
// Answer (6):
// __ __ __ __ __ __

In this puzzle world each object says its first name when its lifetime begins and its last name when the object's lifetime ends. It's just that simple.

The challenge and fun is in keeping track of what order objects' lifetimes begin, and knowing what order they must end in.

Each section has a description of the new concept introduced, and the challenges are increased at a leisurely pace.

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): __ __ __ __ __

What is printed?