Notes

  

c++ stuff to not forget

data types (the boxes)

• int - for whole numbers (like how many albums)
• double - for numbers with decimals (like money: 49.99)
• bool (true or false)
• float (similar to double, but less precise. takes less effort to compute!)
• std::string - for any text or words ("bts", "arel")

remember to name them!
std::string name = "arel"; not std::string = "arel";

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operators (the math)

• + (adds)
• * (multiplies)
• / (divides)
• % (modulo, what's left)
• = (this one is important, it means "save the answer into...")

so total = price * amount; calculates the math and saves it in total.

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cin and cout (talking to the computer)

• std::cout << : prints stuff onto the screen. arrows point out.
• std::cin >> : waits for you to type something. arrows point in, to the variable.

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possible coding errors

1. ; : every single instruction needs a semicolon at the end
2. std:: : goes before cout, cin, string, endl.
3. std::endl : makes the text jump to a new line on the receipt.
4. " " : use quotes for words you want to print, but no quotes for variables.
   • std::cout << "total: "; (prints the word total:)
   • std::cout << total; (prints the number saved inside the total variable)