Mikroelektronika MIKROE-350 データシート

In order to force the compiler to interpret our example the other way around, we
have to write it explicitly:

if expression1 then

if expression2 then

statement1

statement2

Use the 

select case

statement to pass control to a specific program branch, based

on a certain condition. The 

select case

statement consists of selector expression

(condition) and list of possible values. The syntax of the 

select case

statement is:

select case selector

case value_1

statements_1

...
case value_n

statements_n

[

default_statements]

selector

is an expression which should evaluate as integral value. 

values

can be

literals, constants or expressions and 

statements

can be any statements. The 

case

else

clause is optional.

First, the 

selector

expression (condition) is evaluated. The 

select case

statement

then compares it against all available 

values

. If the match is found, the 

statements

following the match evaluate, and the 

select case

statement terminates. In case

there are multiple matches, the first matching statement will be executed. If none of
the 

values

matches the selector, then 

default_statements

in the 

case else

clause (if there is one) are executed.

Here is a simple example of the select case statement:

select case operator

case "*"

res = n1 * n2

case "/"

res = n1 / n2

case "+"

res = n1 + n2

case "-"

res = n1 - n2

case else

res = 0
cnt = cnt + 1

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- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 5