Fizz Buzz

FizzBuzz is a word game used to teach young school children about division. The students sit in a circle and take turns counting, one number each.

Any number that is divisible by 3 is replaced with the word "Fizz"; numbers divisible by 5 are replaced with "Buzz", and numbers divisible by 15 are replaced with "FizzBuzz".

The sequence looks like this:

11, 2, Fizz, 4, Buzz, Fizz, 7, 8, Fizz, Buzz,
211, Fizz, 13, 14, FizzBuzz, 16, 17...

This game, and variants of it, gained popularity within the programming community.

This is because implementing a program that can "solve" FizzBuzz requires a solid foundation in programming. It uses variables, operators, loops, conditional statements, and functions.

It is a useful milestone to ensure we understand all these basic principles. For this reason, candidates applying to programming jobs are sometimes asked to implement FizzBuzz in their interviews.

The Challenge

Our challenge is to do this in C++! We've learned all we need to implement FizzBuzz at this point. Using loops, functions, conditionals, and the modulus operator, we need to:

• Write a program that logs out the numbers from 1 to 100.
• Each number should appear in its own line
• Numbers divisible by 3 are replaced with Fizz
• Numbers divisible by 5 are replaced with Buzz
• Numbers divisible by 15 are replaced with FizzBuzz
• This should not require more than 30 lines of code

The output should look something like the following. I've omitted 17-97 for brevity, but the pattern continues in that range:

11
22
3Fizz
44
5Buzz
6Fizz
77
88
9Fizz
10Buzz
1111
12Fizz
1313
1414
15FizzBuzz
1616
17  pattern continues until...
1898
19Fizz
20Buzz

Starting Point

Remember to include the basic scaffolding we’ve been using so far, so we have access to the tools we need to log to the terminal.

A basic starting point is available below:

1#include <iostream>
2using namespace std;
3
4int main() {
5
6}

Hints

A series of hints, culminating in a full solution, are included below.

However, rather than immediately looking at the hints, consider reviewing the previous lessons, or searching the internet for assistance first.

This is very common even in professional settings. Much of programming involves figuring things out, so it’s a good habit to practice.

When solving problems, try to not excessively rely on trial and error. Even if this approach ends up generating the desired output, if you don’t understand why your code works, you can’t transfer that success to other projects.

Remember the goal - it’s not to create FizzBuzz - it is to learn how to program, so you can create whatever you want.

1#include <iostream>
2using namespace std;
3
4void Log(int Number) {
5  // If Number is divisible by 15, log FizzBuzz
6  // Else If Number is divisible by 5, log Buzz
7  // Else If Number is divisible by 3, log Fizz
8  // Else, log out the number
9  // Log out a '\n'
10}
11
12int main() {
13  // Call Log 100 times, with the numbers from
14  // 1 to 100
15}

1#include <iostream>
2using namespace std;
3
4void Log(int Number) {
5  // If Number is divisible by 15, log FizzBuzz
6  if (Number % 15 == 0) {
7    cout << "FizzBuzz";
8  }
9  // else if Number is divisible by 5, log Buzz
10  // else if Number is divisible by 3, log Fizz
11  // else, log out the number
12  // Log out a '\n'
13}
14
15int main() {
16  // Using a loop, eg a while loop, call Log
17  // 100 times with the numbers from 1 to 30
18}

1#include <iostream>
2using namespace std;
3
4void Log(int Number) {
5  if (Number % 15 == 0) {
6    cout << "FizzBuzz";
7  } else if (Number % 5 == 0) {
8    cout << "Buzz";
9  } else if (/* Is number divisible by 3? */) {
10    cout << "Fizz";
11  } else {
12    // Log out the number
13  }
14  //  log out a '\n'
15}
16
17int main() {
18  int LoopIteration{1};
19  while (/* loop 100 times */) {
20    ++LoopIteration;
21    // call the Log function
22  }
23}

1#include <iostream>
2using namespace std;
3
4void Log(int Number) {
5  if (Number % 15 == 0) {
6    cout << "FizzBuzz";
7  } else if (Number % 5 == 0) {
8    cout << "Buzz";
9  } else if (Number % 3 == 0) {
10    cout << "Fizz";
11  } else {
12    cout << Number;
13  }
14  cout << '\n';
15}
16
17int main() {
18  int LoopIteration{1};
19  while (LoopIteration <= 100) {
20    Log(LoopIteration);
21    ++LoopIteration;
22  }
23}

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