intro.md

Correct by construction?

• If it compiles, it's right (probably)
• Obviously wrong code should not compile

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Hello!

• Games
• C++ Tools
• Google / YouTube
• Finance

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Toolbox

• const & constexpr
• Enumerations
• Lambdas

• RAII
• Static code analysis
• Strong types

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"But I don't make APIs"

Code is a way you treat your coworkers.

— Michael Feathers (@mfeathers)
June 25, 2020

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Trading System

void sendOrder(
  const char *symbol, 
  bool buy, 
  int quantity, 
  double price); 

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Selling shares

void sellMyGoogleShares() {
  sendOrder("GOOG", false, 100, 1000.00); 
}

void expensiveMistake() {
  sendOrder("GOOG", false, 1000.00, 100); 
}

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But what about warnings?

$ gcc -c -Wall -Werror -Wextra expensive.cpp
$