CS 430 Notes - 3:30 Class

Discussion:

Homework Page 171

6c)

A = A * ( B + ( C ) )

<assign> => <id> = <expr>

=> A = <expr>

=> A = <id> * <expr>

=> A = A * <expr>

=> A = A * ( <expr> )

=> A = A * ( <id> + <expr> )

=> A = A * ( B + <expr> )

=> A = A * ( B + ( <expr> ) )

=> A = A * ( B + ( <id> ) )

=> A = A * ( B + ( C ) )

Core Notes

- Core Programs don’t have names.

- Key words are all lowercase (i.e. program, begin, end, etc.)

- It doesn’t say that you have to declare all variables.

- Assignment statements have to be followed by an expression, and followed by a ;

- Expressions in the Comparison must include parentheses

- Use := for assignments as opposed to =

- No mixed Case

Fortran Notes

- Subprograms precede or follow the main code

-

Pascal Notes

- There is a README file that says, at the prompt use c:> ppc386 filename.pp or c:> ppc386 filename.pas

- Every Pascal program starts with the reserve word program

- Every Pascal program then follows with a name (<identifier>)

NOTE: Some compilers will only differentiate identifiers in the first 8 characters

- If it takes in any input or output you need the reserved words input and output

- You must have a begin and end. (note period is included)

- Programs should follow the following format:

program <identifier> (input, output);

begin

end.

- Comments can go anywhere using (* enter comment *) but may or may not span multiple lines; DON’T span multiple lines using Pascal

- If you define a type and a variable in the programs, define type first then var

- Declare variables as, var <identifier-list> : <type>;

Homework:

problem 9 on page 245

problem 10 on page 246

re-read the chapter along with the slides for chapter 5