AS/A level - Computer Science - Chapter 11 – Programming

11.1 Programming Basics
11.2 Constructs
11.3 Structured Programming

11.1 Programming Basics

Implement and write pseudocode from a given design presented as either a program flowchart or structured English
Write pseudocode statements for:
• the declaration of variables and constants
• the assignment of values to variables and constants
• expressions involving any of the arithmetic or logical operators input from the keyboard and boutput to the console.
Use built-in functions and library routines
Any functions not given in the pseudocode guide will be provided
String manipulation functions will always be given

11.2 Constructs

Use pseudocode to write:

• an ‘IF’ statement including the ‘ELSE’ clause and nested IF statements
• a ‘CASE’ structure
• a ‘count-controlled’ loop:
• a ‘post-condition’ loop
• a ‘pre-condition’ loop
Justify why one loop structure may be better suited to solve a problem than the others

**11.3 Structured Programming **

Define and use a procedure
Explain where in the construction of an algorithm it would be appropriate to use a procedure.
Use parameters: A procedure may have none, one or more parameters and A parameter can be passed by reference or by value.
Define and use a function
Explain where in the construction of an algorithm it is appropriate to use a function.
A function is used in an expression, e.g. the return value replaces the call.
Use the terminology associated with procedures and functions: including Procedure / function header, procedure / function interface, parameter, argument, return value
Write efficient pseudocode