SDD

SDD

1. Error Types

   • Syntax
     • Error in writing the code
     • Program will not run
   • Execution
     • Doing something illegal
     • Program will crash
   • Logic
     • Incorrect mathematics
     • Incorrect output

2. Pre-defined Functions

   • Length
     • Calculates length of string
   • Round
     • Rounds a float to decimal places
   • Random
     • Generates a random number
   • Modulus
     • Calculates remainder of a division sum

3. Subprograms

   • Procedures and Functions
     • Procedures
       • Produce an effect, not a value
     • Functions
       • Produce a value
   • Variables
     • Parameters
       • Formal parameters
         • Used within subprogram
       • Actual parameters
         • Listed when the subprogram is called from within the main program
     • Local and Global
       • Local
         • Scope: Within a subprogram
       • Global
         • Scope: Main Program
   • Top-level algorithm
     • Describes how data moves between subprograms

4. Testing

   • Breakpoints
     • Stops a program at a certain point to check variables are correct
   • Dry run
     • Following the variables on pen and paper through the program
   • Test Table
     • Track variable at different point in the program
   • Watchpoints
     • Stops the program when a variable changes to a certain value