Basic Lines of Code in C++

• Types
  • int, int32_t, int64_t, double
• Variables
  • int n = 42;
  • auto n = 42;
  • const auto n = 42;
  • vector<string> words;
  • matrix<double> mat;
  • unordered_map<string, contact_info> contact_info_for_id;
• Functions
  • auto multiply(int a, int b) -> int { return a * b; }
  • auto print(const contact_info& a) { ...; }
  • auto concat(const string_view a, const string_view b) -> string { return ...; }
• Loops
  • for (int i = 1; i <= 10; ++i) { ...; }
  • for (size_t i = 0; i < words.size(); ++i) { ...; }
  • for (int i : {5, 7, 11, 13}) { ...; }
  • for (const auto& word : words) { ... }

Note
In C++ int and 42 are typically 32 bits wide, not 64 bits.