Get ADA An Introduction: Ada Reference Manual (July 1980) PDF

By Henry Ledgard (auth.)

ISBN-10: 0387905685

ISBN-13: 9780387905686

ISBN-10: 1468401262

ISBN-13: 9781468401264

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Extra resources for ADA An Introduction: Ada Reference Manual (July 1980)

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The selection values given in a when clause are not limited to single values. In particular, a listing of values or a range of values may be given. Thus the case statement above could not be written: case TODAY is when MON => OPEN_ACCOUNTS; COMPUTE_INITIAL BALANCE; when TUE .. THU => GENERATE_REPORT(TODAY); => COMPUTE_CLOSING_BALANCE; when FRI CLOSE_ACCOUNTS; when SAT I SUN => null; end case; Finally, there are instances where the selecting expression has multiple values and where, except for a few values, the actions to be taken are identical.

Consider the following table, which describes the number of hours worked on each day of the week: Day Monday Tuesday Wednesday Thursday Friday Saturday Sunday Hours Worked 8 8 8 10 8 0 0 22 Describing Data Given the enumeration type DAY declared above, this table could be declared as: HOURS_WORKED: array (DAY FIRST .. DAY LAST) of INTEGER; 1 1 Just as for enumeration types, array type definitions can be named in a type declaration and the name can be used to declare array variables. For example, we may have: type WORK_DATA is array (DAY 1 FIRST ..

Single character literals are enclosed by single quotes. You have to be a bit careful here, as strings of characters are enclosed by double quotes. Thus we have: 'A' "A" the character A the string A of length one No language would be very useful without some facility for arithmetic computation. The most familiar arithmetic type is the type named INTEGER used for exact arithmetic. This type denotes a finite subset of the whole numbers. The range of integer values is implicitly limited by the representation adopted by a given implementation.

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ADA An Introduction: Ada Reference Manual (July 1980) by Henry Ledgard (auth.)


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