Técnica de visualización científica para datos discretos o continuos a trozos 48

——————————————_{————-———}—— _{—-—————}

C-72 SAMPLE APPLICATIONS DataF1ex 2.0 _User's Manual

CUSTOMER FILE DESCRIPTION:

The _{specifications (sizep content} and _{indexing) of the} CUSTOMER data base

_file

can be displayed or printed out with the FILEDEF program. The _{display/printout looks like} this:

FILE DEFINITION LISTING FOR FILE #25

***************************************************

FILE ROOT NAME = CUSTOMER USER DISPLAY NAME ₌ CUSTOMER FILE SHORT NAME = CUSTONER

***************************************************

RECORD LENGTH ₌ 128 (USED = 103) MAX NUMBER OF RECORDS = lOó (USED = 4) DELETED SPACE IS REUSED

MULTI-USER RE-READ INACTIVE

***************************************************

FIELD FIELD FIELD FIELD DEC MAIM RELATES--TO NMBR OFFSET LEN TYPE PTS INDEX FILE FIELD

1 1 30 ASCII O O O O CUSTOMER 2 31 30 ASCII O O O O ADDRESS 3 61 14 ASCII O O O O CITY 4 75 2 ASCII O O O O STATE 5 77 10 ASCII O O O O ZIP 6 87

_l

NUMERIC O O O O DISCOUNT

7 88 4 NUMERIC 2 O O O PUR MONTH

8 92 4 NUMERIC 2 O O O PUR YEAR

9 96 4 NUMERIC 2 O O O PROFIT

10 lOó 4 NUMERIC 2 O O O DUE

INDEX

_l:

FIELD SEGMENTS: <1> <0>

This display

_tells

us the following things about the ájSTOMER

file:

The CUSTOMER

_file

_{is DataFlex}

_file

number 25

The ROOT FILE NAME _(the one that

_will

show on a _{disk directory)} is

"CUSTOMER"

When a

_{file list}

_{is displayed to the operator}

it

will

show as "CUSTOMER FILE"

Each CUSTOMER _record

_will

_take up 128 bytes in the data

file

(record

length) and _{that of the} l28g 103 _bytes have been used.

The

_file

can contain up to lOó customers _{(provided there is sufficient}

disk storage) but _{that only four records currently} exist.

====."=====".======"==="=====—_———————————__— —————————————

DataFlex 2.0 _User's Manual SAMPLE APPLICATIONS C-73

If

a custaner is deleted. the next customer _to be added

_will

be assigned _{the deleted custanerts disk} and _record number _{automatically} by _{DataFlex (deleted} space is REUSED).

The CUSTOMER

_file

_{is not} expected _to be used _{in a multiuser environ-} ment. _(Multi-user Re-read _{is set} INACTIVE).

There are 10 data _{fields in} each _{custaner record. Their lengths,} data

types, and names _{are also} shown.

One index _{is active for the} CJJSTOMER

_file,

composed _{of field} <1> _(the customer name), and _field <0> _(the system _record number).

Note _{that the 4-byte} NUMERIC _fields

_will

each _hold 8 _digits. 2 _after

the decimal _point.

Notice that in this

_file

the record number _is used as a system _assign- ed account number. _{This provides for} maximum _operator and _systan speed when _finding a custcmer _{record (particularly since} the _operator would remember _frequently used customer numbers). Where _{this doesn't} work _welb you could create an additional indexeci _field

for user-

assigned account _{IVS or not} use any codes _{at all} by always _{using the} CUSTOMER NNE. The _operator can easily FIND the record by QJSTOMER NN4E _{since that field is also indexed.} Although access by _record number _{is fastest, the} INDEXING _{in DataFlex is} so fast that indexing

should _not be avoided _for reasons _{of performance.}

The _record number <0> _is made _{part of the index with} CUSTOMER NAME _to

create unique index _{entries to allow} two customers _with same name. THE <CUSTOMER> CONFIGURATION FILE

The

_file

name of the ájSTOMER

_file

_{configuration} on _your demo _{disk is} "CUSTOMER.FRM". The _{configuratfon}

_file

_{looks like this:}

—

C-74 SAMPLE APPLICATIONS _DataFlex 2.0 _User's Manual

/F0RM

DATA ACCESS CORPORATION CUSTOMER MASTER FILE

CUSTOMER NUMBER:

<_.>

NAME: <

'

ADDRESS: CITY: ST:

_

ZIP: DISCOUNT: _.% PURMASES/MONTH $ .

_

PURMASES/YEAR $

._

PROFIT/YEAR $

._

Windows _with < > can be used _to FIND customers

l*

//

This is a simple ENTER _{configuration for} customer

_file

maintenance.

//

Since the windows _are processed sequentia11y9 _the AUTOPAGE _function can

//

be used and _the windows do _not have _to be _explicitly named.

OPEN CUSTOMER

_//

_All

_files

must be opened

ENTER CUSTOMER AUTOPAGE FORM

//

Each ENTRY connand _{is followed} by _the database element

it

references.

//

The window _is assigned by autopage. _{After the} command _the

//

options surrounded by _{}.

ENTRY CUSTOMER.RECNUM {AUTOFIND,N0PUT}

//

Translation: Do data _entry on the record number of the customer

// file.

Automaticaily FIND by _{this field} when data _{in input,} but

//

do not _put data back _{into the record buffer since record} number

//

caMt be changed.

ENTRY CUSTOMER.CUSTOMER

//

Translation: Do data _entry on the customer name of the customer

_file

ENTRY CUSTOMER.ADDRESS

ENTRY CUSTOMER.CITY ENTRY CUSTOMER.STATE ENTRY CUSTOMER.ZIP ENTRY CUSTOMER.DISCOUNT

ENTRY CUST0MER.PUR_MONTH {DISPLAYONLY}

//

Translation: When _the customer

_file

_is founcb _display purchases

//

for the month _{in this} window

ENTRY CUST0MER.PUR_YEAR {DISPLAY0NLY} ENTRY CUSTOMER.PROFIT {DISPLAYONI-Y} RETURN

_//

_return from _{entry section} ENTEREND

_//

end _{of enter configuration} ABORT

_//

_{abort after} escape key.

KEYPROC KEY.USER// _{Define action of} user defined key OUTPUT FORM

_//

Output _the page

ENTAGAIN

_//

Return _to same window

RETURN

_//

End _{definition of} user defined key

————————————

DataF1ex 2.0 _User's Manual SAMPLE APPLICATIONS C-75

The HELP screens in the actual configuration have been eliminated in

the above

_listing

_to save space» as have certain spacing lines in the screen image

.

The _{top of the configuration}

_file

_{is the} IMAGE _{format of} the _screen.

DataFlex

_will

display the form _exactly as

_it

appears in the

_first

part of the configuration. First the page is named _{with the} "/F0RM",

designating "FORM" as the name of the page. The DATA WINDOWS are numbered from

_left

_{to right,} top _to bottom. _{Notice that the last} four

windows _are numeric and _{that the last three contain exactly} two _places

to the right of the decimal _point. There

are ten windows _{in this} image _format.

In _this image, _{there is} a one-to-one correspondence between _{the fields}

in the data

_file

and _{the display} windows on the CRT _screen. Images do

not need _{to display all fields} from a

_file;

a single data _field from a

file

might be all that was needed to be _displayed.

The _{line following the} end _{of the} screen contains a

"l*".

This mark

indicates the end _{of the} image _format.

_It

_is a required e1«nent _of

the configuraton.

_{It tells}

the DataF1ex _compiler where _the end _{of the} image _is, and where _the command _{part of the configuration begins.} The

_first

command _line opens the CUSTOMER

_file.

_All

_files

_{that are to} be used _in a configuration must be OPENed. OPENS should be _{at the}

beginlng of the configuration.

The next _{line in the configuration} "ENTER CUSTOMER" begins _the ENTER Command Group. The ENTER command _is a DataFlex macro that is really

more like a complete program than _just a comnand _since

it

controls the whole _{operation of this configuration.}

The _{next line,} "AUTOPAGE FORM",

_tells

_{the DataFlex} compil er that we

will be _{using the} page named "FORM". By _using AUTOPAGE, we don't have

to specify each window on the page. They are assigned _{automatically}

in sequence by _the connand.

The _next 10 _{lines are} ENTRY commands. ENTRY comands work _{with the} ENTER ccmnand and _specify each data element and window. The window numbers can be _emitted because _{of the} use of the AUTOPAGE Command. See the _{section of this} manual on the ENTER Command Macro _for a complete _{discussion of the functions} and uses of ENTRY.

The

_first

ENTRY connand _line uses two _options:

AUTOFIND: Executes _a FIND _using data _{in the} window when _the <RETURN> key _{is pressed.}

NOPUT: Do _not put data BACK INTO _the record _{buffer since}

the record number _(the window data _{in this} case) _can

riot be changed.

C-76 SAMPLE APPLICATIONS DataF1ex _{2.0 User's} Manual ———————

Refer to the ENTER Ccmmand Macro _{section for} a

_{full list}

of options.

At _{this time,} review each _{of the} command _{lines to} see how _the

_file

and

field element names correspond to the windows _{in the} screen image and

the data

_file

_definition. Note _{that in line} one, record number _is connected _to window one (account number). _{This is typical} in

_files

where _{the record} number _is used as a system-assigned account number. The _{last line of the} ENTER _{configuration for} CUSTCNER FILE _is an ABORT. When a

file

maintenance session is complete. pressing the ESCAPE key _will cause the configuration to abort.

WSTOMER FILE REPORT EXAMPLE:

You need a simple report to

_list

our customers, their discount and

total purchases. The _{following is the output of the} REPORT program:

ájsToMER FILE

CUSTOMER DISCOUNT PUR/YEAR

4 DATA ACCESS CORPORATION 15% 100.00

3 DYSAN CORPORATION 5% _49,713.50

2 MAXELL 20% 12,056.00

l

MT MICROSYSTEMS» INC. 30% _57,000.00

118,869.50

~

DataFlex 2.0 _User's Manual SAMPLE APPLICATIONS C-77 — —

This report is produced _{wIth the following report configuration:} /HEADER

QJSTOMER FILE

CUSTOMER DISCOUNT PUR/YEAR

/BODY RESIDENT

0 _O%

»D_

/TOTAL

l*

OUTFILE

_//direct

_{the output}

OPEN CUSTOMER INDEX.I _{//open the custaner}

_file

REPORT CUSTOMER BY INDEX.I

//Print

the customers _in custcmer name order.

SECTION HEADER

OUTPUT HEADER _{//slmply output the} page headings SECTION BODY

PRINT QjST0t·ER.RECNUM _{//customer id} number _is system assigned PRINT ájSTOMER.CUSTOMER _//custcmer name

PRINT ájsToMER.DIscoUNT PRINT ájsT0MER.pUR_YEAR OUTPUT BODY

SECTION TOTAL

SUBTOTAL BODY.4 _{//subtotal will take the accumulator}

//for

any numeric window and _print

//it

in another window.

//print

the total purchases _{for all}

OUTPUT TOTAL _{//custcmers in the} database

REPORTEND ABORT

~

—————— —

C-78 SAMPLE APPLICATIONS DataF1ex 2.0 _User's Manual

THE VENDOR FILE:

The vendor

_file,

_{like the} CUSTOMER

_file,

_is a single

_file

configura- tion. We will relate other

_files

to

_it

at a later time. The

_first

step _{is to} run the VENDOR _{configuration} from _the DEMO menu. Then examine _the

_file

_{definition for} VENDOR and compare

it

with that of the

CUSTOMER

_file.

FILE DEFINITION LISTING FOR FILE #21

***************************************************

FILE ROOT NAME = VENDOR USER DISPLAY NAME = VENDOR SHORT NAME ₌ VENDOR

***************************************************

RECORD LENGTH = 128 (USED ₌ 112) MAX NUMBER OF RECORDS = 400 (USED = 15) DELETED SPACE IS REUSED

. MULTI-USER RE-READ INACTIVE

***************************************************

FIELD FIELD FIELD FIELD DEC MAIN RELATES--TO NMBR OFFSET LEN TYPE PTS INDEX FILE FIELD

l

l

30 ASCII

_l

O O VENDOR 2 31 30 ASCII O O O ADDRESS 3 61 14 ASCII O O O CITY 4 75 2 ASCII O O O STATE 5 77 9 ASCII O O O ZIP 6 86 3 ASCII O O O PHONE-AC 7 89 3 ASCII O O O FH0NE_Exá-g 8 92 4 ASCII O O O FH0ME_NUMBER 9 96 2 NUMERIC O O O O TERMS 10 98 4 NUMERIC 2 O O O CREDIT_LIMIT

li

102 4 NUMERIC 2 O O O CREDIT_USED 12 106 4 NUMERIC 2 O O O PURCHASES 13 110 3 DATE O O O LAST_PURCHASE

INDEX

_l:

FIELD SEGMENTS: <1> <0>

Note _{that the} use of record number as an account number _is used here as well. The indexing is also very much the same as in the CUSTOMER data base

_file.

The _{only real difference is the content of the}

DataFlex 2.0 _User's Manual SAMPLE APPLICATIONS C-79

fields. This is an important DataF1ex _{concept: that the} way infor-

mation _{is dealt with} remains _constant even though _{the application may} change.

The VENDOR

_file

_{introduces us to the} DATE data _type and _{field format.} Dates _in DataF1ex _{are kept in} JULIAN _{format, or, the} number _of days

since day _zero. SInce dates are kept as numbers we can use them _in

arithmetic expressions (add or subtract them). This is quite useful for ageing _reports and due date _{calculations, etc.} Even though _dates

are stored as numbers, _they are always _{displayed in} a DATE format window

_{(_J_J_)}

automatically converted to the conventional MM/DD/YY

format.

File maintenance on the VENDOR

_file

uses the following configuration:

——————————————————-———————————— —-——

————

C-80 SAMPLE APPLICATIONS _{DataFlex 2.0 User's} Manual

/F0RM

DATA ACCESS CORPORATION VENDOR MASTER FILE

VENDOR NUMBER: <

_

.> CCN'ANY: <

'

ADDRESS: CITY: ST:

_

ZIP: PHONE: ( )

-

TERMS (DAYS) _:

_.

OUTSTANDINGCREDIT LIMIT:CREDIT: $$

_{._}

._

In document Algoritmos de pre y post proceso para métodos numéricos de puntos, métodos de partículas y libres de mallas (página 60-63)