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Aminet 45
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Aminet 45 (2001)(GTI - Schatztruhe)[!][Oct 2001].iso
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block
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2001-04-06
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NAME
block
DESCRIPTION
A block is a special statment, that begins with '{', contains
a list of statements, and ends with '}'.
The block may define local variables. If for a variable no
initialisation is given, the variable is initialised to 0 every
time the block is entered. Otherwise, the initialisation
expression is evaluated and its result assigned to the variable
everytime the block is entered.
Example definitions are:
int i;
int j = 3;
int k = 3 * j, l;
Here, i and l are both initialised to 0; j is initialised
to 3, and k is initialised to 9 (3 * j).
Local variables defined in a block are visible only until the
end of the block. Definitions in an inner block hide definitions in
outer blocks.
HISTORY
Up to 3.2.7, local variables were visible (from their point of
definition) in the whole function. That is, code like
do {
int res;
res = ...
} while (res == 5);
write(res);
was perfectly legal. It is no longer, as 'res' ceases to exist
with the closing '}' of the while().
You can get this old behaviour back with the #pragma no_local_scopes.
To turn it off again, use #pragma local_scopes.
Up to 3.2.8, local variables could not be initialised in their
definition.