Basic Building Blocks

3 class hours

Basic Building Blocks

Types

• A type is the name of the set of all possible values that an expression might have
• As of now, the types we will use in our language are
  • int
  • double
  • char
  • bool
  • cp::string

Slides

Memory Model - Part 1

• This is a very simplified view of how a computer running a C++ program manages memory.
• Basic functions: store and retrieve.
• The resulting value of an expression is stored in a memory location that can be retrieved using its name.

Slides

Variables and Constants

• A variable is the name of a location that stores a value of a particular type
  • Has a value and a type
• Not the same as a math variable
• Declaration and Initialisation
• Constant: a variable whose value does not change

Slides

Operators, Expressions, Statements

• Operator: To simplify writing certain expressions (e.g., +, -)
• Expression: A meaningful program fragment
• Statement: The smallest unit of execution. A simple statement must end with a semicolon.

Slides